[1846] | 1 | """This module defines the scantable class.""" |
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| 2 | |
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[1697] | 3 | import os |
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[2315] | 4 | import tempfile |
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[1948] | 5 | import numpy |
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[1691] | 6 | try: |
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| 7 | from functools import wraps as wraps_dec |
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| 8 | except ImportError: |
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| 9 | from asap.compatibility import wraps as wraps_dec |
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| 10 | |
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[1824] | 11 | from asap.env import is_casapy |
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[876] | 12 | from asap._asap import Scantable |
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[2004] | 13 | from asap._asap import filler, msfiller |
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[1824] | 14 | from asap.parameters import rcParams |
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[1862] | 15 | from asap.logging import asaplog, asaplog_post_dec |
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[1824] | 16 | from asap.selector import selector |
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| 17 | from asap.linecatalog import linecatalog |
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[1600] | 18 | from asap.coordinate import coordinate |
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[1859] | 19 | from asap.utils import _n_bools, mask_not, mask_and, mask_or, page |
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[1907] | 20 | from asap.asapfitter import fitter |
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[102] | 21 | |
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[1689] | 22 | def preserve_selection(func): |
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[1691] | 23 | @wraps_dec(func) |
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[1689] | 24 | def wrap(obj, *args, **kw): |
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| 25 | basesel = obj.get_selection() |
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[1857] | 26 | try: |
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| 27 | val = func(obj, *args, **kw) |
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| 28 | finally: |
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| 29 | obj.set_selection(basesel) |
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[1689] | 30 | return val |
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| 31 | return wrap |
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| 32 | |
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[1846] | 33 | def is_scantable(filename): |
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| 34 | """Is the given file a scantable? |
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[1689] | 35 | |
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[1846] | 36 | Parameters: |
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| 37 | |
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| 38 | filename: the name of the file/directory to test |
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| 39 | |
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| 40 | """ |
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[1883] | 41 | if ( os.path.isdir(filename) |
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| 42 | and os.path.exists(filename+'/table.info') |
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| 43 | and os.path.exists(filename+'/table.dat') ): |
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| 44 | f=open(filename+'/table.info') |
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| 45 | l=f.readline() |
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| 46 | f.close() |
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| 47 | #if ( l.find('Scantable') != -1 ): |
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| 48 | if ( l.find('Measurement Set') == -1 ): |
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| 49 | return True |
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| 50 | else: |
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| 51 | return False |
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| 52 | else: |
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| 53 | return False |
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| 54 | ## return (os.path.isdir(filename) |
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| 55 | ## and not os.path.exists(filename+'/table.f1') |
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| 56 | ## and os.path.exists(filename+'/table.info')) |
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[1697] | 57 | |
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[1883] | 58 | def is_ms(filename): |
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| 59 | """Is the given file a MeasurementSet? |
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[1697] | 60 | |
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[1883] | 61 | Parameters: |
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| 62 | |
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| 63 | filename: the name of the file/directory to test |
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| 64 | |
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| 65 | """ |
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| 66 | if ( os.path.isdir(filename) |
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| 67 | and os.path.exists(filename+'/table.info') |
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| 68 | and os.path.exists(filename+'/table.dat') ): |
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| 69 | f=open(filename+'/table.info') |
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| 70 | l=f.readline() |
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| 71 | f.close() |
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| 72 | if ( l.find('Measurement Set') != -1 ): |
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| 73 | return True |
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| 74 | else: |
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| 75 | return False |
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| 76 | else: |
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| 77 | return False |
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[2186] | 78 | |
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| 79 | def normalise_edge_param(edge): |
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| 80 | """\ |
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| 81 | Convert a given edge value to a one-dimensional array that can be |
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| 82 | given to baseline-fitting/subtraction functions. |
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| 83 | The length of the output value will be an even because values for |
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| 84 | the both sides of spectra are to be contained for each IF. When |
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| 85 | the length is 2, the values will be applied to all IFs. If the length |
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| 86 | is larger than 2, it will be 2*ifnos(). |
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| 87 | Accepted format of edge include: |
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| 88 | * an integer - will be used for both sides of spectra of all IFs. |
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| 89 | e.g. 10 is converted to [10,10] |
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[2277] | 90 | * an empty list/tuple [] - converted to [0, 0] and used for all IFs. |
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[2186] | 91 | * a list/tuple containing an integer - same as the above case. |
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| 92 | e.g. [10] is converted to [10,10] |
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| 93 | * a list/tuple containing two integers - will be used for all IFs. |
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| 94 | e.g. [5,10] is output as it is. no need to convert. |
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| 95 | * a list/tuple of lists/tuples containing TWO integers - |
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| 96 | each element of edge will be used for each IF. |
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[2277] | 97 | e.g. [[5,10],[15,20]] - [5,10] for IF[0] and [15,20] for IF[1]. |
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| 98 | |
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| 99 | If an element contains the same integer values, the input 'edge' |
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| 100 | parameter can be given in a simpler shape in the following cases: |
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[2186] | 101 | ** when len(edge)!=2 |
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[2277] | 102 | any elements containing the same values can be replaced |
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| 103 | to single integers. |
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| 104 | e.g. [[15,15]] can be simplified to [15] (or [15,15] or 15 also). |
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| 105 | e.g. [[1,1],[2,2],[3,3]] can be simplified to [1,2,3]. |
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[2186] | 106 | ** when len(edge)=2 |
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| 107 | care is needed for this case: ONLY ONE of the |
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| 108 | elements can be a single integer, |
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| 109 | e.g. [[5,5],[10,10]] can be simplified to [5,[10,10]] |
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[2277] | 110 | or [[5,5],10], but can NOT be simplified to [5,10]. |
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[2186] | 111 | when [5,10] given, it is interpreted as |
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[2277] | 112 | [[5,10],[5,10],[5,10],...] instead, as shown before. |
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[2186] | 113 | """ |
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| 114 | from asap import _is_sequence_or_number as _is_valid |
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| 115 | if isinstance(edge, list) or isinstance(edge, tuple): |
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| 116 | for edgepar in edge: |
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| 117 | if not _is_valid(edgepar, int): |
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| 118 | raise ValueError, "Each element of the 'edge' tuple has \ |
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| 119 | to be a pair of integers or an integer." |
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| 120 | if isinstance(edgepar, list) or isinstance(edgepar, tuple): |
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| 121 | if len(edgepar) != 2: |
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| 122 | raise ValueError, "Each element of the 'edge' tuple has \ |
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| 123 | to be a pair of integers or an integer." |
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| 124 | else: |
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| 125 | if not _is_valid(edge, int): |
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| 126 | raise ValueError, "Parameter 'edge' has to be an integer or a \ |
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| 127 | pair of integers specified as a tuple. \ |
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| 128 | Nested tuples are allowed \ |
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| 129 | to make individual selection for different IFs." |
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| 130 | |
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| 131 | |
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| 132 | if isinstance(edge, int): |
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| 133 | edge = [ edge, edge ] # e.g. 3 => [3,3] |
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| 134 | elif isinstance(edge, list) or isinstance(edge, tuple): |
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| 135 | if len(edge) == 0: |
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| 136 | edge = [0, 0] # e.g. [] => [0,0] |
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| 137 | elif len(edge) == 1: |
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| 138 | if isinstance(edge[0], int): |
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| 139 | edge = [ edge[0], edge[0] ] # e.g. [1] => [1,1] |
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| 140 | |
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| 141 | commonedge = True |
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| 142 | if len(edge) > 2: commonedge = False |
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| 143 | else: |
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| 144 | for edgepar in edge: |
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| 145 | if isinstance(edgepar, list) or isinstance(edgepar, tuple): |
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| 146 | commonedge = False |
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| 147 | break |
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| 148 | |
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| 149 | if commonedge: |
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| 150 | if len(edge) > 1: |
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| 151 | norm_edge = edge |
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| 152 | else: |
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| 153 | norm_edge = edge + edge |
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| 154 | else: |
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| 155 | norm_edge = [] |
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| 156 | for edgepar in edge: |
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| 157 | if isinstance(edgepar, int): |
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| 158 | norm_edge += [edgepar, edgepar] |
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| 159 | else: |
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| 160 | norm_edge += edgepar |
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| 161 | |
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| 162 | return norm_edge |
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| 163 | |
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| 164 | def raise_fitting_failure_exception(e): |
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| 165 | msg = "The fit failed, possibly because it didn't converge." |
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| 166 | if rcParams["verbose"]: |
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| 167 | asaplog.push(str(e)) |
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| 168 | asaplog.push(str(msg)) |
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| 169 | else: |
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| 170 | raise RuntimeError(str(e)+'\n'+msg) |
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| 171 | |
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[2189] | 172 | def pack_progress_params(showprogress, minnrow): |
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| 173 | return str(showprogress).lower() + ',' + str(minnrow) |
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| 174 | |
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[876] | 175 | class scantable(Scantable): |
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[1846] | 176 | """\ |
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| 177 | The ASAP container for scans (single-dish data). |
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[102] | 178 | """ |
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[1819] | 179 | |
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[1862] | 180 | @asaplog_post_dec |
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[2315] | 181 | def __init__(self, filename, average=None, unit=None, parallactify=None, |
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| 182 | **args): |
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[1846] | 183 | """\ |
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[102] | 184 | Create a scantable from a saved one or make a reference |
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[1846] | 185 | |
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[102] | 186 | Parameters: |
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[1846] | 187 | |
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| 188 | filename: the name of an asap table on disk |
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| 189 | or |
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| 190 | the name of a rpfits/sdfits/ms file |
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| 191 | (integrations within scans are auto averaged |
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| 192 | and the whole file is read) or |
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| 193 | [advanced] a reference to an existing scantable |
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| 194 | |
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| 195 | average: average all integrations withinb a scan on read. |
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| 196 | The default (True) is taken from .asaprc. |
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| 197 | |
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[484] | 198 | unit: brightness unit; must be consistent with K or Jy. |
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[1846] | 199 | Over-rides the default selected by the filler |
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| 200 | (input rpfits/sdfits/ms) or replaces the value |
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| 201 | in existing scantables |
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| 202 | |
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[1920] | 203 | antenna: for MeasurementSet input data only: |
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[2349] | 204 | Antenna selection. integer (id) or string |
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| 205 | (name or id). |
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[1846] | 206 | |
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[2349] | 207 | parallactify: Indicate that the data had been parallactified. |
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| 208 | Default (false) is taken from rc file. |
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[1846] | 209 | |
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[710] | 210 | """ |
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[976] | 211 | if average is None: |
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[710] | 212 | average = rcParams['scantable.autoaverage'] |
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[1593] | 213 | parallactify = parallactify or rcParams['scantable.parallactify'] |
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[1259] | 214 | varlist = vars() |
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[876] | 215 | from asap._asap import stmath |
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[1819] | 216 | self._math = stmath( rcParams['insitu'] ) |
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[876] | 217 | if isinstance(filename, Scantable): |
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| 218 | Scantable.__init__(self, filename) |
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[181] | 219 | else: |
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[1697] | 220 | if isinstance(filename, str): |
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[976] | 221 | filename = os.path.expandvars(filename) |
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| 222 | filename = os.path.expanduser(filename) |
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| 223 | if not os.path.exists(filename): |
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| 224 | s = "File '%s' not found." % (filename) |
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| 225 | raise IOError(s) |
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[1697] | 226 | if is_scantable(filename): |
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| 227 | ondisk = rcParams['scantable.storage'] == 'disk' |
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| 228 | Scantable.__init__(self, filename, ondisk) |
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| 229 | if unit is not None: |
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| 230 | self.set_fluxunit(unit) |
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[2008] | 231 | if average: |
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| 232 | self._assign( self.average_time( scanav=True ) ) |
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[1819] | 233 | # do not reset to the default freqframe |
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| 234 | #self.set_freqframe(rcParams['scantable.freqframe']) |
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[1883] | 235 | elif is_ms(filename): |
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[1916] | 236 | # Measurement Set |
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| 237 | opts={'ms': {}} |
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| 238 | mskeys=['getpt','antenna'] |
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| 239 | for key in mskeys: |
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| 240 | if key in args.keys(): |
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| 241 | opts['ms'][key] = args[key] |
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| 242 | self._fill([filename], unit, average, opts) |
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[1893] | 243 | elif os.path.isfile(filename): |
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[1916] | 244 | self._fill([filename], unit, average) |
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[2350] | 245 | # only apply to new data not "copy constructor" |
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| 246 | self.parallactify(parallactify) |
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[1883] | 247 | else: |
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[1819] | 248 | msg = "The given file '%s'is not a valid " \ |
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| 249 | "asap table." % (filename) |
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[1859] | 250 | raise IOError(msg) |
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[1118] | 251 | elif (isinstance(filename, list) or isinstance(filename, tuple)) \ |
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[976] | 252 | and isinstance(filename[-1], str): |
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[1916] | 253 | self._fill(filename, unit, average) |
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[1586] | 254 | self.parallactify(parallactify) |
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[1259] | 255 | self._add_history("scantable", varlist) |
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[102] | 256 | |
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[1862] | 257 | @asaplog_post_dec |
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[876] | 258 | def save(self, name=None, format=None, overwrite=False): |
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[1846] | 259 | """\ |
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[1280] | 260 | Store the scantable on disk. This can be an asap (aips++) Table, |
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| 261 | SDFITS or MS2 format. |
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[1846] | 262 | |
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[116] | 263 | Parameters: |
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[1846] | 264 | |
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[2431] | 265 | name: the name of the outputfile. For format 'ASCII' |
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[1093] | 266 | this is the root file name (data in 'name'.txt |
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[497] | 267 | and header in 'name'_header.txt) |
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[1855] | 268 | |
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[116] | 269 | format: an optional file format. Default is ASAP. |
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[1855] | 270 | Allowed are: |
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| 271 | |
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| 272 | * 'ASAP' (save as ASAP [aips++] Table), |
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| 273 | * 'SDFITS' (save as SDFITS file) |
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| 274 | * 'ASCII' (saves as ascii text file) |
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| 275 | * 'MS2' (saves as an casacore MeasurementSet V2) |
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[2315] | 276 | * 'FITS' (save as image FITS - not readable by |
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| 277 | class) |
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[1855] | 278 | * 'CLASS' (save as FITS readable by CLASS) |
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| 279 | |
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[411] | 280 | overwrite: If the file should be overwritten if it exists. |
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[256] | 281 | The default False is to return with warning |
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[411] | 282 | without writing the output. USE WITH CARE. |
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[1855] | 283 | |
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[1846] | 284 | Example:: |
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| 285 | |
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[116] | 286 | scan.save('myscan.asap') |
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[1118] | 287 | scan.save('myscan.sdfits', 'SDFITS') |
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[1846] | 288 | |
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[116] | 289 | """ |
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[411] | 290 | from os import path |
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[1593] | 291 | format = format or rcParams['scantable.save'] |
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[256] | 292 | suffix = '.'+format.lower() |
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[1118] | 293 | if name is None or name == "": |
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[256] | 294 | name = 'scantable'+suffix |
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[718] | 295 | msg = "No filename given. Using default name %s..." % name |
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| 296 | asaplog.push(msg) |
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[411] | 297 | name = path.expandvars(name) |
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[256] | 298 | if path.isfile(name) or path.isdir(name): |
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| 299 | if not overwrite: |
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[718] | 300 | msg = "File %s exists." % name |
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[1859] | 301 | raise IOError(msg) |
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[451] | 302 | format2 = format.upper() |
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| 303 | if format2 == 'ASAP': |
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[116] | 304 | self._save(name) |
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[2029] | 305 | elif format2 == 'MS2': |
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| 306 | msopt = {'ms': {'overwrite': overwrite } } |
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| 307 | from asap._asap import mswriter |
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| 308 | writer = mswriter( self ) |
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| 309 | writer.write( name, msopt ) |
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[116] | 310 | else: |
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[989] | 311 | from asap._asap import stwriter as stw |
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[1118] | 312 | writer = stw(format2) |
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| 313 | writer.write(self, name) |
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[116] | 314 | return |
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| 315 | |
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[102] | 316 | def copy(self): |
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[1846] | 317 | """Return a copy of this scantable. |
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| 318 | |
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| 319 | *Note*: |
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| 320 | |
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[1348] | 321 | This makes a full (deep) copy. scan2 = scan1 makes a reference. |
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[1846] | 322 | |
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| 323 | Example:: |
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| 324 | |
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[102] | 325 | copiedscan = scan.copy() |
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[1846] | 326 | |
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[102] | 327 | """ |
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[876] | 328 | sd = scantable(Scantable._copy(self)) |
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[113] | 329 | return sd |
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| 330 | |
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[1093] | 331 | def drop_scan(self, scanid=None): |
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[1846] | 332 | """\ |
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[1093] | 333 | Return a new scantable where the specified scan number(s) has(have) |
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| 334 | been dropped. |
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[1846] | 335 | |
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[1093] | 336 | Parameters: |
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[1846] | 337 | |
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[1093] | 338 | scanid: a (list of) scan number(s) |
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[1846] | 339 | |
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[1093] | 340 | """ |
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| 341 | from asap import _is_sequence_or_number as _is_valid |
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| 342 | from asap import _to_list |
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| 343 | from asap import unique |
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| 344 | if not _is_valid(scanid): |
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[2315] | 345 | raise RuntimeError( 'Please specify a scanno to drop from the' |
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| 346 | ' scantable' ) |
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[1859] | 347 | scanid = _to_list(scanid) |
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| 348 | allscans = unique([ self.getscan(i) for i in range(self.nrow())]) |
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| 349 | for sid in scanid: allscans.remove(sid) |
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| 350 | if len(allscans) == 0: |
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| 351 | raise ValueError("Can't remove all scans") |
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| 352 | sel = selector(scans=allscans) |
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| 353 | return self._select_copy(sel) |
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[1093] | 354 | |
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[1594] | 355 | def _select_copy(self, selection): |
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| 356 | orig = self.get_selection() |
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| 357 | self.set_selection(orig+selection) |
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| 358 | cp = self.copy() |
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| 359 | self.set_selection(orig) |
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| 360 | return cp |
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| 361 | |
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[102] | 362 | def get_scan(self, scanid=None): |
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[1855] | 363 | """\ |
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[102] | 364 | Return a specific scan (by scanno) or collection of scans (by |
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| 365 | source name) in a new scantable. |
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[1846] | 366 | |
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| 367 | *Note*: |
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| 368 | |
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[1348] | 369 | See scantable.drop_scan() for the inverse operation. |
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[1846] | 370 | |
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[102] | 371 | Parameters: |
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[1846] | 372 | |
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[513] | 373 | scanid: a (list of) scanno or a source name, unix-style |
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| 374 | patterns are accepted for source name matching, e.g. |
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| 375 | '*_R' gets all 'ref scans |
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[1846] | 376 | |
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| 377 | Example:: |
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| 378 | |
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[513] | 379 | # get all scans containing the source '323p459' |
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| 380 | newscan = scan.get_scan('323p459') |
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| 381 | # get all 'off' scans |
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| 382 | refscans = scan.get_scan('*_R') |
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| 383 | # get a susbset of scans by scanno (as listed in scan.summary()) |
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[1118] | 384 | newscan = scan.get_scan([0, 2, 7, 10]) |
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[1846] | 385 | |
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[102] | 386 | """ |
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| 387 | if scanid is None: |
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[1859] | 388 | raise RuntimeError( 'Please specify a scan no or name to ' |
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| 389 | 'retrieve from the scantable' ) |
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[102] | 390 | try: |
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[946] | 391 | bsel = self.get_selection() |
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| 392 | sel = selector() |
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[102] | 393 | if type(scanid) is str: |
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[946] | 394 | sel.set_name(scanid) |
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[1594] | 395 | return self._select_copy(sel) |
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[102] | 396 | elif type(scanid) is int: |
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[946] | 397 | sel.set_scans([scanid]) |
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[1594] | 398 | return self._select_copy(sel) |
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[381] | 399 | elif type(scanid) is list: |
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[946] | 400 | sel.set_scans(scanid) |
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[1594] | 401 | return self._select_copy(sel) |
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[381] | 402 | else: |
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[718] | 403 | msg = "Illegal scanid type, use 'int' or 'list' if ints." |
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[1859] | 404 | raise TypeError(msg) |
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[102] | 405 | except RuntimeError: |
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[1859] | 406 | raise |
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[102] | 407 | |
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| 408 | def __str__(self): |
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[2315] | 409 | tempFile = tempfile.NamedTemporaryFile() |
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| 410 | Scantable._summary(self, tempFile.name) |
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| 411 | tempFile.seek(0) |
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| 412 | asaplog.clear() |
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| 413 | return tempFile.file.read() |
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[102] | 414 | |
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[2315] | 415 | @asaplog_post_dec |
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[976] | 416 | def summary(self, filename=None): |
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[1846] | 417 | """\ |
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[102] | 418 | Print a summary of the contents of this scantable. |
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[1846] | 419 | |
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[102] | 420 | Parameters: |
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[1846] | 421 | |
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[1931] | 422 | filename: the name of a file to write the putput to |
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[102] | 423 | Default - no file output |
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[1846] | 424 | |
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[102] | 425 | """ |
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| 426 | if filename is not None: |
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[256] | 427 | if filename is "": |
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| 428 | filename = 'scantable_summary.txt' |
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[415] | 429 | from os.path import expandvars, isdir |
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[411] | 430 | filename = expandvars(filename) |
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[2286] | 431 | if isdir(filename): |
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[718] | 432 | msg = "Illegal file name '%s'." % (filename) |
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[1859] | 433 | raise IOError(msg) |
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[2286] | 434 | else: |
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| 435 | filename = "" |
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| 436 | Scantable._summary(self, filename) |
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[710] | 437 | |
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[1512] | 438 | def get_spectrum(self, rowno): |
---|
[1471] | 439 | """Return the spectrum for the current row in the scantable as a list. |
---|
[1846] | 440 | |
---|
[1471] | 441 | Parameters: |
---|
[1846] | 442 | |
---|
[1573] | 443 | rowno: the row number to retrieve the spectrum from |
---|
[1846] | 444 | |
---|
[1471] | 445 | """ |
---|
| 446 | return self._getspectrum(rowno) |
---|
[946] | 447 | |
---|
[1471] | 448 | def get_mask(self, rowno): |
---|
| 449 | """Return the mask for the current row in the scantable as a list. |
---|
[1846] | 450 | |
---|
[1471] | 451 | Parameters: |
---|
[1846] | 452 | |
---|
[1573] | 453 | rowno: the row number to retrieve the mask from |
---|
[1846] | 454 | |
---|
[1471] | 455 | """ |
---|
| 456 | return self._getmask(rowno) |
---|
| 457 | |
---|
| 458 | def set_spectrum(self, spec, rowno): |
---|
[1938] | 459 | """Set the spectrum for the current row in the scantable. |
---|
[1846] | 460 | |
---|
[1471] | 461 | Parameters: |
---|
[1846] | 462 | |
---|
[1855] | 463 | spec: the new spectrum |
---|
[1846] | 464 | |
---|
[1855] | 465 | rowno: the row number to set the spectrum for |
---|
| 466 | |
---|
[1471] | 467 | """ |
---|
[2348] | 468 | assert(len(spec) == self.nchan(self.getif(rowno))) |
---|
[1471] | 469 | return self._setspectrum(spec, rowno) |
---|
| 470 | |
---|
[1600] | 471 | def get_coordinate(self, rowno): |
---|
| 472 | """Return the (spectral) coordinate for a a given 'rowno'. |
---|
[1846] | 473 | |
---|
| 474 | *Note*: |
---|
| 475 | |
---|
[1600] | 476 | * This coordinate is only valid until a scantable method modifies |
---|
| 477 | the frequency axis. |
---|
| 478 | * This coordinate does contain the original frequency set-up |
---|
| 479 | NOT the new frame. The conversions however are done using the user |
---|
| 480 | specified frame (e.g. LSRK/TOPO). To get the 'real' coordinate, |
---|
| 481 | use scantable.freq_align first. Without it there is no closure, |
---|
[1846] | 482 | i.e.:: |
---|
[1600] | 483 | |
---|
[1846] | 484 | c = myscan.get_coordinate(0) |
---|
| 485 | c.to_frequency(c.get_reference_pixel()) != c.get_reference_value() |
---|
| 486 | |
---|
[1600] | 487 | Parameters: |
---|
[1846] | 488 | |
---|
[1600] | 489 | rowno: the row number for the spectral coordinate |
---|
| 490 | |
---|
| 491 | """ |
---|
| 492 | return coordinate(Scantable.get_coordinate(self, rowno)) |
---|
| 493 | |
---|
[946] | 494 | def get_selection(self): |
---|
[1846] | 495 | """\ |
---|
[1005] | 496 | Get the selection object currently set on this scantable. |
---|
[1846] | 497 | |
---|
| 498 | Example:: |
---|
| 499 | |
---|
[1005] | 500 | sel = scan.get_selection() |
---|
| 501 | sel.set_ifs(0) # select IF 0 |
---|
| 502 | scan.set_selection(sel) # apply modified selection |
---|
[1846] | 503 | |
---|
[946] | 504 | """ |
---|
| 505 | return selector(self._getselection()) |
---|
| 506 | |
---|
[1576] | 507 | def set_selection(self, selection=None, **kw): |
---|
[1846] | 508 | """\ |
---|
[1005] | 509 | Select a subset of the data. All following operations on this scantable |
---|
| 510 | are only applied to thi selection. |
---|
[1846] | 511 | |
---|
[1005] | 512 | Parameters: |
---|
[1697] | 513 | |
---|
[1846] | 514 | selection: a selector object (default unset the selection), or |
---|
[2431] | 515 | any combination of 'pols', 'ifs', 'beams', 'scans', |
---|
| 516 | 'cycles', 'name', 'query' |
---|
[1697] | 517 | |
---|
[1846] | 518 | Examples:: |
---|
[1697] | 519 | |
---|
[1005] | 520 | sel = selector() # create a selection object |
---|
[1118] | 521 | self.set_scans([0, 3]) # select SCANNO 0 and 3 |
---|
[1005] | 522 | scan.set_selection(sel) # set the selection |
---|
| 523 | scan.summary() # will only print summary of scanno 0 an 3 |
---|
| 524 | scan.set_selection() # unset the selection |
---|
[1697] | 525 | # or the equivalent |
---|
| 526 | scan.set_selection(scans=[0,3]) |
---|
| 527 | scan.summary() # will only print summary of scanno 0 an 3 |
---|
| 528 | scan.set_selection() # unset the selection |
---|
[1846] | 529 | |
---|
[946] | 530 | """ |
---|
[1576] | 531 | if selection is None: |
---|
| 532 | # reset |
---|
| 533 | if len(kw) == 0: |
---|
| 534 | selection = selector() |
---|
| 535 | else: |
---|
| 536 | # try keywords |
---|
| 537 | for k in kw: |
---|
| 538 | if k not in selector.fields: |
---|
[2320] | 539 | raise KeyError("Invalid selection key '%s', " |
---|
| 540 | "valid keys are %s" % (k, |
---|
| 541 | selector.fields)) |
---|
[1576] | 542 | selection = selector(**kw) |
---|
[946] | 543 | self._setselection(selection) |
---|
| 544 | |
---|
[1819] | 545 | def get_row(self, row=0, insitu=None): |
---|
[1846] | 546 | """\ |
---|
[1819] | 547 | Select a row in the scantable. |
---|
| 548 | Return a scantable with single row. |
---|
[1846] | 549 | |
---|
[1819] | 550 | Parameters: |
---|
[1846] | 551 | |
---|
| 552 | row: row no of integration, default is 0. |
---|
| 553 | insitu: if False a new scantable is returned. Otherwise, the |
---|
| 554 | scaling is done in-situ. The default is taken from .asaprc |
---|
| 555 | (False) |
---|
| 556 | |
---|
[1819] | 557 | """ |
---|
[2349] | 558 | if insitu is None: |
---|
| 559 | insitu = rcParams['insitu'] |
---|
[1819] | 560 | if not insitu: |
---|
| 561 | workscan = self.copy() |
---|
| 562 | else: |
---|
| 563 | workscan = self |
---|
| 564 | # Select a row |
---|
[2349] | 565 | sel = selector() |
---|
[1992] | 566 | sel.set_rows([row]) |
---|
[1819] | 567 | workscan.set_selection(sel) |
---|
| 568 | if not workscan.nrow() == 1: |
---|
[2349] | 569 | msg = "Could not identify single row. %d rows selected." \ |
---|
| 570 | % (workscan.nrow()) |
---|
[1819] | 571 | raise RuntimeError(msg) |
---|
| 572 | if insitu: |
---|
| 573 | self._assign(workscan) |
---|
| 574 | else: |
---|
| 575 | return workscan |
---|
| 576 | |
---|
[1862] | 577 | @asaplog_post_dec |
---|
[1907] | 578 | def stats(self, stat='stddev', mask=None, form='3.3f', row=None): |
---|
[1846] | 579 | """\ |
---|
[135] | 580 | Determine the specified statistic of the current beam/if/pol |
---|
[102] | 581 | Takes a 'mask' as an optional parameter to specify which |
---|
| 582 | channels should be excluded. |
---|
[1846] | 583 | |
---|
[102] | 584 | Parameters: |
---|
[1846] | 585 | |
---|
[1819] | 586 | stat: 'min', 'max', 'min_abc', 'max_abc', 'sumsq', 'sum', |
---|
| 587 | 'mean', 'var', 'stddev', 'avdev', 'rms', 'median' |
---|
[1855] | 588 | |
---|
[135] | 589 | mask: an optional mask specifying where the statistic |
---|
[102] | 590 | should be determined. |
---|
[1855] | 591 | |
---|
[1819] | 592 | form: format string to print statistic values |
---|
[1846] | 593 | |
---|
[1907] | 594 | row: row number of spectrum to process. |
---|
| 595 | (default is None: for all rows) |
---|
[1846] | 596 | |
---|
[1907] | 597 | Example: |
---|
[113] | 598 | scan.set_unit('channel') |
---|
[1118] | 599 | msk = scan.create_mask([100, 200], [500, 600]) |
---|
[135] | 600 | scan.stats(stat='mean', mask=m) |
---|
[1846] | 601 | |
---|
[102] | 602 | """ |
---|
[1593] | 603 | mask = mask or [] |
---|
[876] | 604 | if not self._check_ifs(): |
---|
[1118] | 605 | raise ValueError("Cannot apply mask as the IFs have different " |
---|
| 606 | "number of channels. Please use setselection() " |
---|
| 607 | "to select individual IFs") |
---|
[1819] | 608 | rtnabc = False |
---|
| 609 | if stat.lower().endswith('_abc'): rtnabc = True |
---|
| 610 | getchan = False |
---|
| 611 | if stat.lower().startswith('min') or stat.lower().startswith('max'): |
---|
| 612 | chan = self._math._minmaxchan(self, mask, stat) |
---|
| 613 | getchan = True |
---|
| 614 | statvals = [] |
---|
[1907] | 615 | if not rtnabc: |
---|
| 616 | if row == None: |
---|
| 617 | statvals = self._math._stats(self, mask, stat) |
---|
| 618 | else: |
---|
| 619 | statvals = self._math._statsrow(self, mask, stat, int(row)) |
---|
[256] | 620 | |
---|
[1819] | 621 | #def cb(i): |
---|
| 622 | # return statvals[i] |
---|
[256] | 623 | |
---|
[1819] | 624 | #return self._row_callback(cb, stat) |
---|
[102] | 625 | |
---|
[1819] | 626 | label=stat |
---|
| 627 | #callback=cb |
---|
| 628 | out = "" |
---|
| 629 | #outvec = [] |
---|
| 630 | sep = '-'*50 |
---|
[1907] | 631 | |
---|
| 632 | if row == None: |
---|
| 633 | rows = xrange(self.nrow()) |
---|
| 634 | elif isinstance(row, int): |
---|
| 635 | rows = [ row ] |
---|
| 636 | |
---|
| 637 | for i in rows: |
---|
[1819] | 638 | refstr = '' |
---|
| 639 | statunit= '' |
---|
| 640 | if getchan: |
---|
| 641 | qx, qy = self.chan2data(rowno=i, chan=chan[i]) |
---|
| 642 | if rtnabc: |
---|
| 643 | statvals.append(qx['value']) |
---|
| 644 | refstr = ('(value: %'+form) % (qy['value'])+' ['+qy['unit']+'])' |
---|
| 645 | statunit= '['+qx['unit']+']' |
---|
| 646 | else: |
---|
| 647 | refstr = ('(@ %'+form) % (qx['value'])+' ['+qx['unit']+'])' |
---|
| 648 | |
---|
| 649 | tm = self._gettime(i) |
---|
| 650 | src = self._getsourcename(i) |
---|
| 651 | out += 'Scan[%d] (%s) ' % (self.getscan(i), src) |
---|
| 652 | out += 'Time[%s]:\n' % (tm) |
---|
[1907] | 653 | if self.nbeam(-1) > 1: out += ' Beam[%d] ' % (self.getbeam(i)) |
---|
| 654 | if self.nif(-1) > 1: out += ' IF[%d] ' % (self.getif(i)) |
---|
| 655 | if self.npol(-1) > 1: out += ' Pol[%d] ' % (self.getpol(i)) |
---|
[1819] | 656 | #outvec.append(callback(i)) |
---|
[1907] | 657 | if len(rows) > 1: |
---|
| 658 | # out += ('= %'+form) % (outvec[i]) +' '+refstr+'\n' |
---|
| 659 | out += ('= %'+form) % (statvals[i]) +' '+refstr+'\n' |
---|
| 660 | else: |
---|
| 661 | # out += ('= %'+form) % (outvec[0]) +' '+refstr+'\n' |
---|
| 662 | out += ('= %'+form) % (statvals[0]) +' '+refstr+'\n' |
---|
[1819] | 663 | out += sep+"\n" |
---|
| 664 | |
---|
[1859] | 665 | import os |
---|
| 666 | if os.environ.has_key( 'USER' ): |
---|
| 667 | usr = os.environ['USER'] |
---|
| 668 | else: |
---|
| 669 | import commands |
---|
| 670 | usr = commands.getoutput( 'whoami' ) |
---|
| 671 | tmpfile = '/tmp/tmp_'+usr+'_casapy_asap_scantable_stats' |
---|
| 672 | f = open(tmpfile,'w') |
---|
| 673 | print >> f, sep |
---|
| 674 | print >> f, ' %s %s' % (label, statunit) |
---|
| 675 | print >> f, sep |
---|
| 676 | print >> f, out |
---|
| 677 | f.close() |
---|
| 678 | f = open(tmpfile,'r') |
---|
| 679 | x = f.readlines() |
---|
| 680 | f.close() |
---|
| 681 | asaplog.push(''.join(x), False) |
---|
| 682 | |
---|
[1819] | 683 | return statvals |
---|
| 684 | |
---|
| 685 | def chan2data(self, rowno=0, chan=0): |
---|
[1846] | 686 | """\ |
---|
[1819] | 687 | Returns channel/frequency/velocity and spectral value |
---|
| 688 | at an arbitrary row and channel in the scantable. |
---|
[1846] | 689 | |
---|
[1819] | 690 | Parameters: |
---|
[1846] | 691 | |
---|
[1819] | 692 | rowno: a row number in the scantable. Default is the |
---|
| 693 | first row, i.e. rowno=0 |
---|
[1855] | 694 | |
---|
[1819] | 695 | chan: a channel in the scantable. Default is the first |
---|
| 696 | channel, i.e. pos=0 |
---|
[1846] | 697 | |
---|
[1819] | 698 | """ |
---|
| 699 | if isinstance(rowno, int) and isinstance(chan, int): |
---|
| 700 | qx = {'unit': self.get_unit(), |
---|
| 701 | 'value': self._getabcissa(rowno)[chan]} |
---|
| 702 | qy = {'unit': self.get_fluxunit(), |
---|
| 703 | 'value': self._getspectrum(rowno)[chan]} |
---|
| 704 | return qx, qy |
---|
| 705 | |
---|
[1118] | 706 | def stddev(self, mask=None): |
---|
[1846] | 707 | """\ |
---|
[135] | 708 | Determine the standard deviation of the current beam/if/pol |
---|
| 709 | Takes a 'mask' as an optional parameter to specify which |
---|
| 710 | channels should be excluded. |
---|
[1846] | 711 | |
---|
[135] | 712 | Parameters: |
---|
[1846] | 713 | |
---|
[135] | 714 | mask: an optional mask specifying where the standard |
---|
| 715 | deviation should be determined. |
---|
| 716 | |
---|
[1846] | 717 | Example:: |
---|
| 718 | |
---|
[135] | 719 | scan.set_unit('channel') |
---|
[1118] | 720 | msk = scan.create_mask([100, 200], [500, 600]) |
---|
[135] | 721 | scan.stddev(mask=m) |
---|
[1846] | 722 | |
---|
[135] | 723 | """ |
---|
[1118] | 724 | return self.stats(stat='stddev', mask=mask); |
---|
[135] | 725 | |
---|
[1003] | 726 | |
---|
[1259] | 727 | def get_column_names(self): |
---|
[1846] | 728 | """\ |
---|
[1003] | 729 | Return a list of column names, which can be used for selection. |
---|
| 730 | """ |
---|
[1259] | 731 | return list(Scantable.get_column_names(self)) |
---|
[1003] | 732 | |
---|
[1730] | 733 | def get_tsys(self, row=-1): |
---|
[1846] | 734 | """\ |
---|
[113] | 735 | Return the System temperatures. |
---|
[1846] | 736 | |
---|
| 737 | Parameters: |
---|
| 738 | |
---|
| 739 | row: the rowno to get the information for. (default all rows) |
---|
| 740 | |
---|
[113] | 741 | Returns: |
---|
[1846] | 742 | |
---|
[876] | 743 | a list of Tsys values for the current selection |
---|
[1846] | 744 | |
---|
[113] | 745 | """ |
---|
[1730] | 746 | if row > -1: |
---|
| 747 | return self._get_column(self._gettsys, row) |
---|
[876] | 748 | return self._row_callback(self._gettsys, "Tsys") |
---|
[256] | 749 | |
---|
[2406] | 750 | def get_tsysspectrum(self, row=-1): |
---|
| 751 | """\ |
---|
| 752 | Return the channel dependent system temperatures. |
---|
[1730] | 753 | |
---|
[2406] | 754 | Parameters: |
---|
| 755 | |
---|
| 756 | row: the rowno to get the information for. (default all rows) |
---|
| 757 | |
---|
| 758 | Returns: |
---|
| 759 | |
---|
| 760 | a list of Tsys values for the current selection |
---|
| 761 | |
---|
| 762 | """ |
---|
| 763 | return self._get_column( self._gettsysspectrum, row ) |
---|
| 764 | |
---|
[1730] | 765 | def get_weather(self, row=-1): |
---|
[1846] | 766 | """\ |
---|
| 767 | Return the weather informations. |
---|
| 768 | |
---|
| 769 | Parameters: |
---|
| 770 | |
---|
| 771 | row: the rowno to get the information for. (default all rows) |
---|
| 772 | |
---|
| 773 | Returns: |
---|
| 774 | |
---|
| 775 | a dict or list of of dicts of values for the current selection |
---|
| 776 | |
---|
| 777 | """ |
---|
| 778 | |
---|
[1730] | 779 | values = self._get_column(self._get_weather, row) |
---|
| 780 | if row > -1: |
---|
| 781 | return {'temperature': values[0], |
---|
| 782 | 'pressure': values[1], 'humidity' : values[2], |
---|
| 783 | 'windspeed' : values[3], 'windaz' : values[4] |
---|
| 784 | } |
---|
| 785 | else: |
---|
| 786 | out = [] |
---|
| 787 | for r in values: |
---|
| 788 | |
---|
| 789 | out.append({'temperature': r[0], |
---|
| 790 | 'pressure': r[1], 'humidity' : r[2], |
---|
| 791 | 'windspeed' : r[3], 'windaz' : r[4] |
---|
| 792 | }) |
---|
| 793 | return out |
---|
| 794 | |
---|
[876] | 795 | def _row_callback(self, callback, label): |
---|
| 796 | out = "" |
---|
[1118] | 797 | outvec = [] |
---|
[1590] | 798 | sep = '-'*50 |
---|
[876] | 799 | for i in range(self.nrow()): |
---|
| 800 | tm = self._gettime(i) |
---|
| 801 | src = self._getsourcename(i) |
---|
[1590] | 802 | out += 'Scan[%d] (%s) ' % (self.getscan(i), src) |
---|
[876] | 803 | out += 'Time[%s]:\n' % (tm) |
---|
[1590] | 804 | if self.nbeam(-1) > 1: |
---|
| 805 | out += ' Beam[%d] ' % (self.getbeam(i)) |
---|
| 806 | if self.nif(-1) > 1: out += ' IF[%d] ' % (self.getif(i)) |
---|
| 807 | if self.npol(-1) > 1: out += ' Pol[%d] ' % (self.getpol(i)) |
---|
[876] | 808 | outvec.append(callback(i)) |
---|
| 809 | out += '= %3.3f\n' % (outvec[i]) |
---|
[1590] | 810 | out += sep+'\n' |
---|
[1859] | 811 | |
---|
| 812 | asaplog.push(sep) |
---|
| 813 | asaplog.push(" %s" % (label)) |
---|
| 814 | asaplog.push(sep) |
---|
| 815 | asaplog.push(out) |
---|
[1861] | 816 | asaplog.post() |
---|
[1175] | 817 | return outvec |
---|
[256] | 818 | |
---|
[1947] | 819 | def _get_column(self, callback, row=-1, *args): |
---|
[1070] | 820 | """ |
---|
| 821 | """ |
---|
| 822 | if row == -1: |
---|
[1947] | 823 | return [callback(i, *args) for i in range(self.nrow())] |
---|
[1070] | 824 | else: |
---|
[1819] | 825 | if 0 <= row < self.nrow(): |
---|
[1947] | 826 | return callback(row, *args) |
---|
[256] | 827 | |
---|
[1070] | 828 | |
---|
[1948] | 829 | def get_time(self, row=-1, asdatetime=False, prec=-1): |
---|
[1846] | 830 | """\ |
---|
[113] | 831 | Get a list of time stamps for the observations. |
---|
[1938] | 832 | Return a datetime object or a string (default) for each |
---|
| 833 | integration time stamp in the scantable. |
---|
[1846] | 834 | |
---|
[113] | 835 | Parameters: |
---|
[1846] | 836 | |
---|
[1348] | 837 | row: row no of integration. Default -1 return all rows |
---|
[1855] | 838 | |
---|
[1348] | 839 | asdatetime: return values as datetime objects rather than strings |
---|
[1846] | 840 | |
---|
[2349] | 841 | prec: number of digits shown. Default -1 to automatic |
---|
| 842 | calculation. |
---|
[1948] | 843 | Note this number is equals to the digits of MVTime, |
---|
| 844 | i.e., 0<prec<3: dates with hh:: only, |
---|
| 845 | <5: with hh:mm:, <7 or 0: with hh:mm:ss, |
---|
[1947] | 846 | and 6> : with hh:mm:ss.tt... (prec-6 t's added) |
---|
| 847 | |
---|
[113] | 848 | """ |
---|
[1175] | 849 | from datetime import datetime |
---|
[1948] | 850 | if prec < 0: |
---|
| 851 | # automagically set necessary precision +1 |
---|
[2349] | 852 | prec = 7 - \ |
---|
| 853 | numpy.floor(numpy.log10(numpy.min(self.get_inttime(row)))) |
---|
[1948] | 854 | prec = max(6, int(prec)) |
---|
| 855 | else: |
---|
| 856 | prec = max(0, prec) |
---|
| 857 | if asdatetime: |
---|
| 858 | #precision can be 1 millisecond at max |
---|
| 859 | prec = min(12, prec) |
---|
| 860 | |
---|
[1947] | 861 | times = self._get_column(self._gettime, row, prec) |
---|
[1348] | 862 | if not asdatetime: |
---|
[1392] | 863 | return times |
---|
[1947] | 864 | format = "%Y/%m/%d/%H:%M:%S.%f" |
---|
| 865 | if prec < 7: |
---|
| 866 | nsub = 1 + (((6-prec)/2) % 3) |
---|
| 867 | substr = [".%f","%S","%M"] |
---|
| 868 | for i in range(nsub): |
---|
| 869 | format = format.replace(substr[i],"") |
---|
[1175] | 870 | if isinstance(times, list): |
---|
[1947] | 871 | return [datetime.strptime(i, format) for i in times] |
---|
[1175] | 872 | else: |
---|
[1947] | 873 | return datetime.strptime(times, format) |
---|
[102] | 874 | |
---|
[1348] | 875 | |
---|
| 876 | def get_inttime(self, row=-1): |
---|
[1846] | 877 | """\ |
---|
[1348] | 878 | Get a list of integration times for the observations. |
---|
| 879 | Return a time in seconds for each integration in the scantable. |
---|
[1846] | 880 | |
---|
[1348] | 881 | Parameters: |
---|
[1846] | 882 | |
---|
[1348] | 883 | row: row no of integration. Default -1 return all rows. |
---|
[1846] | 884 | |
---|
[1348] | 885 | """ |
---|
[1573] | 886 | return self._get_column(self._getinttime, row) |
---|
[1348] | 887 | |
---|
[1573] | 888 | |
---|
[714] | 889 | def get_sourcename(self, row=-1): |
---|
[1846] | 890 | """\ |
---|
[794] | 891 | Get a list source names for the observations. |
---|
[714] | 892 | Return a string for each integration in the scantable. |
---|
| 893 | Parameters: |
---|
[1846] | 894 | |
---|
[1348] | 895 | row: row no of integration. Default -1 return all rows. |
---|
[1846] | 896 | |
---|
[714] | 897 | """ |
---|
[1070] | 898 | return self._get_column(self._getsourcename, row) |
---|
[714] | 899 | |
---|
[794] | 900 | def get_elevation(self, row=-1): |
---|
[1846] | 901 | """\ |
---|
[794] | 902 | Get a list of elevations for the observations. |
---|
| 903 | Return a float for each integration in the scantable. |
---|
[1846] | 904 | |
---|
[794] | 905 | Parameters: |
---|
[1846] | 906 | |
---|
[1348] | 907 | row: row no of integration. Default -1 return all rows. |
---|
[1846] | 908 | |
---|
[794] | 909 | """ |
---|
[1070] | 910 | return self._get_column(self._getelevation, row) |
---|
[794] | 911 | |
---|
| 912 | def get_azimuth(self, row=-1): |
---|
[1846] | 913 | """\ |
---|
[794] | 914 | Get a list of azimuths for the observations. |
---|
| 915 | Return a float for each integration in the scantable. |
---|
[1846] | 916 | |
---|
[794] | 917 | Parameters: |
---|
[1348] | 918 | row: row no of integration. Default -1 return all rows. |
---|
[1846] | 919 | |
---|
[794] | 920 | """ |
---|
[1070] | 921 | return self._get_column(self._getazimuth, row) |
---|
[794] | 922 | |
---|
| 923 | def get_parangle(self, row=-1): |
---|
[1846] | 924 | """\ |
---|
[794] | 925 | Get a list of parallactic angles for the observations. |
---|
| 926 | Return a float for each integration in the scantable. |
---|
[1846] | 927 | |
---|
[794] | 928 | Parameters: |
---|
[1846] | 929 | |
---|
[1348] | 930 | row: row no of integration. Default -1 return all rows. |
---|
[1846] | 931 | |
---|
[794] | 932 | """ |
---|
[1070] | 933 | return self._get_column(self._getparangle, row) |
---|
[794] | 934 | |
---|
[1070] | 935 | def get_direction(self, row=-1): |
---|
| 936 | """ |
---|
| 937 | Get a list of Positions on the sky (direction) for the observations. |
---|
[1594] | 938 | Return a string for each integration in the scantable. |
---|
[1855] | 939 | |
---|
[1070] | 940 | Parameters: |
---|
[1855] | 941 | |
---|
[1070] | 942 | row: row no of integration. Default -1 return all rows |
---|
[1855] | 943 | |
---|
[1070] | 944 | """ |
---|
| 945 | return self._get_column(self._getdirection, row) |
---|
| 946 | |
---|
[1391] | 947 | def get_directionval(self, row=-1): |
---|
[1846] | 948 | """\ |
---|
[1391] | 949 | Get a list of Positions on the sky (direction) for the observations. |
---|
| 950 | Return a float for each integration in the scantable. |
---|
[1846] | 951 | |
---|
[1391] | 952 | Parameters: |
---|
[1846] | 953 | |
---|
[1391] | 954 | row: row no of integration. Default -1 return all rows |
---|
[1846] | 955 | |
---|
[1391] | 956 | """ |
---|
| 957 | return self._get_column(self._getdirectionvec, row) |
---|
| 958 | |
---|
[1862] | 959 | @asaplog_post_dec |
---|
[102] | 960 | def set_unit(self, unit='channel'): |
---|
[1846] | 961 | """\ |
---|
[102] | 962 | Set the unit for all following operations on this scantable |
---|
[1846] | 963 | |
---|
[102] | 964 | Parameters: |
---|
[1846] | 965 | |
---|
| 966 | unit: optional unit, default is 'channel'. Use one of '*Hz', |
---|
| 967 | 'km/s', 'channel' or equivalent '' |
---|
| 968 | |
---|
[102] | 969 | """ |
---|
[484] | 970 | varlist = vars() |
---|
[1118] | 971 | if unit in ['', 'pixel', 'channel']: |
---|
[113] | 972 | unit = '' |
---|
| 973 | inf = list(self._getcoordinfo()) |
---|
| 974 | inf[0] = unit |
---|
| 975 | self._setcoordinfo(inf) |
---|
[1118] | 976 | self._add_history("set_unit", varlist) |
---|
[113] | 977 | |
---|
[1862] | 978 | @asaplog_post_dec |
---|
[484] | 979 | def set_instrument(self, instr): |
---|
[1846] | 980 | """\ |
---|
[1348] | 981 | Set the instrument for subsequent processing. |
---|
[1846] | 982 | |
---|
[358] | 983 | Parameters: |
---|
[1846] | 984 | |
---|
[710] | 985 | instr: Select from 'ATPKSMB', 'ATPKSHOH', 'ATMOPRA', |
---|
[407] | 986 | 'DSS-43' (Tid), 'CEDUNA', and 'HOBART' |
---|
[1846] | 987 | |
---|
[358] | 988 | """ |
---|
| 989 | self._setInstrument(instr) |
---|
[1118] | 990 | self._add_history("set_instument", vars()) |
---|
[358] | 991 | |
---|
[1862] | 992 | @asaplog_post_dec |
---|
[1190] | 993 | def set_feedtype(self, feedtype): |
---|
[1846] | 994 | """\ |
---|
[1190] | 995 | Overwrite the feed type, which might not be set correctly. |
---|
[1846] | 996 | |
---|
[1190] | 997 | Parameters: |
---|
[1846] | 998 | |
---|
[1190] | 999 | feedtype: 'linear' or 'circular' |
---|
[1846] | 1000 | |
---|
[1190] | 1001 | """ |
---|
| 1002 | self._setfeedtype(feedtype) |
---|
| 1003 | self._add_history("set_feedtype", vars()) |
---|
| 1004 | |
---|
[1862] | 1005 | @asaplog_post_dec |
---|
[276] | 1006 | def set_doppler(self, doppler='RADIO'): |
---|
[1846] | 1007 | """\ |
---|
[276] | 1008 | Set the doppler for all following operations on this scantable. |
---|
[1846] | 1009 | |
---|
[276] | 1010 | Parameters: |
---|
[1846] | 1011 | |
---|
[276] | 1012 | doppler: One of 'RADIO', 'OPTICAL', 'Z', 'BETA', 'GAMMA' |
---|
[1846] | 1013 | |
---|
[276] | 1014 | """ |
---|
[484] | 1015 | varlist = vars() |
---|
[276] | 1016 | inf = list(self._getcoordinfo()) |
---|
| 1017 | inf[2] = doppler |
---|
| 1018 | self._setcoordinfo(inf) |
---|
[1118] | 1019 | self._add_history("set_doppler", vars()) |
---|
[710] | 1020 | |
---|
[1862] | 1021 | @asaplog_post_dec |
---|
[226] | 1022 | def set_freqframe(self, frame=None): |
---|
[1846] | 1023 | """\ |
---|
[113] | 1024 | Set the frame type of the Spectral Axis. |
---|
[1846] | 1025 | |
---|
[113] | 1026 | Parameters: |
---|
[1846] | 1027 | |
---|
[591] | 1028 | frame: an optional frame type, default 'LSRK'. Valid frames are: |
---|
[1819] | 1029 | 'TOPO', 'LSRD', 'LSRK', 'BARY', |
---|
[1118] | 1030 | 'GEO', 'GALACTO', 'LGROUP', 'CMB' |
---|
[1846] | 1031 | |
---|
| 1032 | Example:: |
---|
| 1033 | |
---|
[113] | 1034 | scan.set_freqframe('BARY') |
---|
[1846] | 1035 | |
---|
[113] | 1036 | """ |
---|
[1593] | 1037 | frame = frame or rcParams['scantable.freqframe'] |
---|
[484] | 1038 | varlist = vars() |
---|
[1819] | 1039 | # "REST" is not implemented in casacore |
---|
| 1040 | #valid = ['REST', 'TOPO', 'LSRD', 'LSRK', 'BARY', \ |
---|
| 1041 | # 'GEO', 'GALACTO', 'LGROUP', 'CMB'] |
---|
| 1042 | valid = ['TOPO', 'LSRD', 'LSRK', 'BARY', \ |
---|
[1118] | 1043 | 'GEO', 'GALACTO', 'LGROUP', 'CMB'] |
---|
[591] | 1044 | |
---|
[989] | 1045 | if frame in valid: |
---|
[113] | 1046 | inf = list(self._getcoordinfo()) |
---|
| 1047 | inf[1] = frame |
---|
| 1048 | self._setcoordinfo(inf) |
---|
[1118] | 1049 | self._add_history("set_freqframe", varlist) |
---|
[102] | 1050 | else: |
---|
[1118] | 1051 | msg = "Please specify a valid freq type. Valid types are:\n", valid |
---|
[1859] | 1052 | raise TypeError(msg) |
---|
[710] | 1053 | |
---|
[1862] | 1054 | @asaplog_post_dec |
---|
[989] | 1055 | def set_dirframe(self, frame=""): |
---|
[1846] | 1056 | """\ |
---|
[989] | 1057 | Set the frame type of the Direction on the sky. |
---|
[1846] | 1058 | |
---|
[989] | 1059 | Parameters: |
---|
[1846] | 1060 | |
---|
[989] | 1061 | frame: an optional frame type, default ''. Valid frames are: |
---|
| 1062 | 'J2000', 'B1950', 'GALACTIC' |
---|
[1846] | 1063 | |
---|
| 1064 | Example: |
---|
| 1065 | |
---|
[989] | 1066 | scan.set_dirframe('GALACTIC') |
---|
[1846] | 1067 | |
---|
[989] | 1068 | """ |
---|
| 1069 | varlist = vars() |
---|
[1859] | 1070 | Scantable.set_dirframe(self, frame) |
---|
[1118] | 1071 | self._add_history("set_dirframe", varlist) |
---|
[989] | 1072 | |
---|
[113] | 1073 | def get_unit(self): |
---|
[1846] | 1074 | """\ |
---|
[113] | 1075 | Get the default unit set in this scantable |
---|
[1846] | 1076 | |
---|
[113] | 1077 | Returns: |
---|
[1846] | 1078 | |
---|
[113] | 1079 | A unit string |
---|
[1846] | 1080 | |
---|
[113] | 1081 | """ |
---|
| 1082 | inf = self._getcoordinfo() |
---|
| 1083 | unit = inf[0] |
---|
| 1084 | if unit == '': unit = 'channel' |
---|
| 1085 | return unit |
---|
[102] | 1086 | |
---|
[1862] | 1087 | @asaplog_post_dec |
---|
[158] | 1088 | def get_abcissa(self, rowno=0): |
---|
[1846] | 1089 | """\ |
---|
[158] | 1090 | Get the abcissa in the current coordinate setup for the currently |
---|
[113] | 1091 | selected Beam/IF/Pol |
---|
[1846] | 1092 | |
---|
[113] | 1093 | Parameters: |
---|
[1846] | 1094 | |
---|
[226] | 1095 | rowno: an optional row number in the scantable. Default is the |
---|
| 1096 | first row, i.e. rowno=0 |
---|
[1846] | 1097 | |
---|
[113] | 1098 | Returns: |
---|
[1846] | 1099 | |
---|
[1348] | 1100 | The abcissa values and the format string (as a dictionary) |
---|
[1846] | 1101 | |
---|
[113] | 1102 | """ |
---|
[256] | 1103 | abc = self._getabcissa(rowno) |
---|
[710] | 1104 | lbl = self._getabcissalabel(rowno) |
---|
[158] | 1105 | return abc, lbl |
---|
[113] | 1106 | |
---|
[1862] | 1107 | @asaplog_post_dec |
---|
[2322] | 1108 | def flag(self, mask=None, unflag=False, row=-1): |
---|
[1846] | 1109 | """\ |
---|
[1001] | 1110 | Flag the selected data using an optional channel mask. |
---|
[1846] | 1111 | |
---|
[1001] | 1112 | Parameters: |
---|
[1846] | 1113 | |
---|
[1001] | 1114 | mask: an optional channel mask, created with create_mask. Default |
---|
| 1115 | (no mask) is all channels. |
---|
[1855] | 1116 | |
---|
[1819] | 1117 | unflag: if True, unflag the data |
---|
[1846] | 1118 | |
---|
[2322] | 1119 | row: an optional row number in the scantable. |
---|
| 1120 | Default -1 flags all rows |
---|
| 1121 | |
---|
[1001] | 1122 | """ |
---|
| 1123 | varlist = vars() |
---|
[1593] | 1124 | mask = mask or [] |
---|
[1994] | 1125 | self._flag(row, mask, unflag) |
---|
[1001] | 1126 | self._add_history("flag", varlist) |
---|
| 1127 | |
---|
[1862] | 1128 | @asaplog_post_dec |
---|
[2322] | 1129 | def flag_row(self, rows=None, unflag=False): |
---|
[1846] | 1130 | """\ |
---|
[1819] | 1131 | Flag the selected data in row-based manner. |
---|
[1846] | 1132 | |
---|
[1819] | 1133 | Parameters: |
---|
[1846] | 1134 | |
---|
[1843] | 1135 | rows: list of row numbers to be flagged. Default is no row |
---|
[2322] | 1136 | (must be explicitly specified to execute row-based |
---|
| 1137 | flagging). |
---|
[1855] | 1138 | |
---|
[1819] | 1139 | unflag: if True, unflag the data. |
---|
[1846] | 1140 | |
---|
[1819] | 1141 | """ |
---|
| 1142 | varlist = vars() |
---|
[2322] | 1143 | if rows is None: |
---|
| 1144 | rows = [] |
---|
[1859] | 1145 | self._flag_row(rows, unflag) |
---|
[1819] | 1146 | self._add_history("flag_row", varlist) |
---|
| 1147 | |
---|
[1862] | 1148 | @asaplog_post_dec |
---|
[1819] | 1149 | def clip(self, uthres=None, dthres=None, clipoutside=True, unflag=False): |
---|
[1846] | 1150 | """\ |
---|
[1819] | 1151 | Flag the selected data outside a specified range (in channel-base) |
---|
[1846] | 1152 | |
---|
[1819] | 1153 | Parameters: |
---|
[1846] | 1154 | |
---|
[1819] | 1155 | uthres: upper threshold. |
---|
[1855] | 1156 | |
---|
[1819] | 1157 | dthres: lower threshold |
---|
[1846] | 1158 | |
---|
[2322] | 1159 | clipoutside: True for flagging data outside the range |
---|
| 1160 | [dthres:uthres]. |
---|
[1928] | 1161 | False for flagging data inside the range. |
---|
[1855] | 1162 | |
---|
[1846] | 1163 | unflag: if True, unflag the data. |
---|
| 1164 | |
---|
[1819] | 1165 | """ |
---|
| 1166 | varlist = vars() |
---|
[1859] | 1167 | self._clip(uthres, dthres, clipoutside, unflag) |
---|
[1819] | 1168 | self._add_history("clip", varlist) |
---|
| 1169 | |
---|
[1862] | 1170 | @asaplog_post_dec |
---|
[1584] | 1171 | def lag_flag(self, start, end, unit="MHz", insitu=None): |
---|
[1846] | 1172 | """\ |
---|
[1192] | 1173 | Flag the data in 'lag' space by providing a frequency to remove. |
---|
[2177] | 1174 | Flagged data in the scantable get interpolated over the region. |
---|
[1192] | 1175 | No taper is applied. |
---|
[1846] | 1176 | |
---|
[1192] | 1177 | Parameters: |
---|
[1846] | 1178 | |
---|
[1579] | 1179 | start: the start frequency (really a period within the |
---|
| 1180 | bandwidth) or period to remove |
---|
[1855] | 1181 | |
---|
[1579] | 1182 | end: the end frequency or period to remove |
---|
[1855] | 1183 | |
---|
[2431] | 1184 | unit: the frequency unit (default 'MHz') or '' for |
---|
[1579] | 1185 | explicit lag channels |
---|
[1846] | 1186 | |
---|
| 1187 | *Notes*: |
---|
| 1188 | |
---|
[1579] | 1189 | It is recommended to flag edges of the band or strong |
---|
[1348] | 1190 | signals beforehand. |
---|
[1846] | 1191 | |
---|
[1192] | 1192 | """ |
---|
| 1193 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 1194 | self._math._setinsitu(insitu) |
---|
| 1195 | varlist = vars() |
---|
[1579] | 1196 | base = { "GHz": 1000000000., "MHz": 1000000., "kHz": 1000., "Hz": 1.} |
---|
| 1197 | if not (unit == "" or base.has_key(unit)): |
---|
[1192] | 1198 | raise ValueError("%s is not a valid unit." % unit) |
---|
[1859] | 1199 | if unit == "": |
---|
| 1200 | s = scantable(self._math._lag_flag(self, start, end, "lags")) |
---|
| 1201 | else: |
---|
| 1202 | s = scantable(self._math._lag_flag(self, start*base[unit], |
---|
| 1203 | end*base[unit], "frequency")) |
---|
[1192] | 1204 | s._add_history("lag_flag", varlist) |
---|
| 1205 | if insitu: |
---|
| 1206 | self._assign(s) |
---|
| 1207 | else: |
---|
| 1208 | return s |
---|
[1001] | 1209 | |
---|
[1862] | 1210 | @asaplog_post_dec |
---|
[2349] | 1211 | def fft(self, rowno=None, mask=None, getrealimag=False): |
---|
[2177] | 1212 | """\ |
---|
| 1213 | Apply FFT to the spectra. |
---|
| 1214 | Flagged data in the scantable get interpolated over the region. |
---|
| 1215 | |
---|
| 1216 | Parameters: |
---|
[2186] | 1217 | |
---|
| 1218 | rowno: The row number(s) to be processed. int, list |
---|
[2349] | 1219 | and tuple are accepted. By default (None), FFT |
---|
[2186] | 1220 | is applied to the whole data. |
---|
| 1221 | |
---|
| 1222 | mask: Auxiliary channel mask(s). Given as a boolean |
---|
| 1223 | list, it is applied to all specified rows. |
---|
| 1224 | A list of boolean lists can also be used to |
---|
| 1225 | apply different masks. In the latter case, the |
---|
| 1226 | length of 'mask' must be the same as that of |
---|
[2349] | 1227 | 'rowno'. The default is None. |
---|
[2177] | 1228 | |
---|
| 1229 | getrealimag: If True, returns the real and imaginary part |
---|
| 1230 | values of the complex results. |
---|
| 1231 | If False (the default), returns the amplitude |
---|
| 1232 | (absolute value) normalised with Ndata/2 and |
---|
| 1233 | phase (argument, in unit of radian). |
---|
| 1234 | |
---|
| 1235 | Returns: |
---|
| 1236 | |
---|
[2186] | 1237 | A list of dictionaries containing the results for each spectrum. |
---|
| 1238 | Each dictionary contains two values, the real and the imaginary |
---|
| 1239 | parts when getrealimag = True, or the amplitude(absolute value) |
---|
| 1240 | and the phase(argument) when getrealimag = False. The key for |
---|
| 1241 | these values are 'real' and 'imag', or 'ampl' and 'phase', |
---|
[2177] | 1242 | respectively. |
---|
| 1243 | """ |
---|
[2349] | 1244 | if rowno is None: |
---|
| 1245 | rowno = [] |
---|
[2177] | 1246 | if isinstance(rowno, int): |
---|
| 1247 | rowno = [rowno] |
---|
| 1248 | elif not (isinstance(rowno, list) or isinstance(rowno, tuple)): |
---|
[2186] | 1249 | raise TypeError("The row number(s) must be int, list or tuple.") |
---|
| 1250 | if len(rowno) == 0: rowno = [i for i in xrange(self.nrow())] |
---|
| 1251 | |
---|
[2411] | 1252 | usecommonmask = True |
---|
| 1253 | |
---|
| 1254 | if mask is None: |
---|
| 1255 | mask = [] |
---|
| 1256 | if isinstance(mask, list) or isinstance(mask, tuple): |
---|
| 1257 | if len(mask) == 0: |
---|
| 1258 | mask = [[]] |
---|
| 1259 | else: |
---|
| 1260 | if isinstance(mask[0], bool): |
---|
| 1261 | if len(mask) != self.nchan(self.getif(rowno[0])): |
---|
| 1262 | raise ValueError("The spectra and the mask have " |
---|
| 1263 | "different length.") |
---|
| 1264 | mask = [mask] |
---|
| 1265 | elif isinstance(mask[0], list) or isinstance(mask[0], tuple): |
---|
| 1266 | usecommonmask = False |
---|
| 1267 | if len(mask) != len(rowno): |
---|
| 1268 | raise ValueError("When specifying masks for each " |
---|
| 1269 | "spectrum, the numbers of them " |
---|
| 1270 | "must be identical.") |
---|
| 1271 | for i in xrange(mask): |
---|
| 1272 | if len(mask[i]) != self.nchan(self.getif(rowno[i])): |
---|
| 1273 | raise ValueError("The spectra and the mask have " |
---|
| 1274 | "different length.") |
---|
| 1275 | else: |
---|
| 1276 | raise TypeError("The mask must be a boolean list or " |
---|
| 1277 | "a list of boolean list.") |
---|
| 1278 | else: |
---|
[2349] | 1279 | raise TypeError("The mask must be a boolean list or a list of " |
---|
| 1280 | "boolean list.") |
---|
[2186] | 1281 | |
---|
| 1282 | res = [] |
---|
| 1283 | |
---|
| 1284 | imask = 0 |
---|
| 1285 | for whichrow in rowno: |
---|
| 1286 | fspec = self._fft(whichrow, mask[imask], getrealimag) |
---|
| 1287 | nspec = len(fspec) |
---|
[2177] | 1288 | |
---|
[2349] | 1289 | i = 0 |
---|
| 1290 | v1 = [] |
---|
| 1291 | v2 = [] |
---|
| 1292 | reselem = {"real":[],"imag":[]} if getrealimag \ |
---|
| 1293 | else {"ampl":[],"phase":[]} |
---|
[2177] | 1294 | |
---|
[2186] | 1295 | while (i < nspec): |
---|
| 1296 | v1.append(fspec[i]) |
---|
| 1297 | v2.append(fspec[i+1]) |
---|
[2349] | 1298 | i += 2 |
---|
[2186] | 1299 | |
---|
[2177] | 1300 | if getrealimag: |
---|
[2186] | 1301 | reselem["real"] += v1 |
---|
| 1302 | reselem["imag"] += v2 |
---|
[2177] | 1303 | else: |
---|
[2186] | 1304 | reselem["ampl"] += v1 |
---|
| 1305 | reselem["phase"] += v2 |
---|
[2177] | 1306 | |
---|
[2186] | 1307 | res.append(reselem) |
---|
| 1308 | |
---|
[2349] | 1309 | if not usecommonmask: |
---|
| 1310 | imask += 1 |
---|
[2186] | 1311 | |
---|
[2177] | 1312 | return res |
---|
| 1313 | |
---|
| 1314 | @asaplog_post_dec |
---|
[113] | 1315 | def create_mask(self, *args, **kwargs): |
---|
[1846] | 1316 | """\ |
---|
[1118] | 1317 | Compute and return a mask based on [min, max] windows. |
---|
[189] | 1318 | The specified windows are to be INCLUDED, when the mask is |
---|
[113] | 1319 | applied. |
---|
[1846] | 1320 | |
---|
[102] | 1321 | Parameters: |
---|
[1846] | 1322 | |
---|
[1118] | 1323 | [min, max], [min2, max2], ... |
---|
[1024] | 1324 | Pairs of start/end points (inclusive)specifying the regions |
---|
[102] | 1325 | to be masked |
---|
[1855] | 1326 | |
---|
[189] | 1327 | invert: optional argument. If specified as True, |
---|
| 1328 | return an inverted mask, i.e. the regions |
---|
| 1329 | specified are EXCLUDED |
---|
[1855] | 1330 | |
---|
[513] | 1331 | row: create the mask using the specified row for |
---|
| 1332 | unit conversions, default is row=0 |
---|
| 1333 | only necessary if frequency varies over rows. |
---|
[1846] | 1334 | |
---|
| 1335 | Examples:: |
---|
| 1336 | |
---|
[113] | 1337 | scan.set_unit('channel') |
---|
[1846] | 1338 | # a) |
---|
[1118] | 1339 | msk = scan.create_mask([400, 500], [800, 900]) |
---|
[189] | 1340 | # masks everything outside 400 and 500 |
---|
[113] | 1341 | # and 800 and 900 in the unit 'channel' |
---|
| 1342 | |
---|
[1846] | 1343 | # b) |
---|
[1118] | 1344 | msk = scan.create_mask([400, 500], [800, 900], invert=True) |
---|
[189] | 1345 | # masks the regions between 400 and 500 |
---|
[113] | 1346 | # and 800 and 900 in the unit 'channel' |
---|
[1846] | 1347 | |
---|
| 1348 | # c) |
---|
| 1349 | #mask only channel 400 |
---|
[1554] | 1350 | msk = scan.create_mask([400]) |
---|
[1846] | 1351 | |
---|
[102] | 1352 | """ |
---|
[1554] | 1353 | row = kwargs.get("row", 0) |
---|
[513] | 1354 | data = self._getabcissa(row) |
---|
[113] | 1355 | u = self._getcoordinfo()[0] |
---|
[1859] | 1356 | if u == "": |
---|
| 1357 | u = "channel" |
---|
| 1358 | msg = "The current mask window unit is %s" % u |
---|
| 1359 | i = self._check_ifs() |
---|
| 1360 | if not i: |
---|
| 1361 | msg += "\nThis mask is only valid for IF=%d" % (self.getif(i)) |
---|
| 1362 | asaplog.push(msg) |
---|
[2348] | 1363 | n = len(data) |
---|
[1295] | 1364 | msk = _n_bools(n, False) |
---|
[710] | 1365 | # test if args is a 'list' or a 'normal *args - UGLY!!! |
---|
| 1366 | |
---|
[2349] | 1367 | ws = (isinstance(args[-1][-1], int) |
---|
| 1368 | or isinstance(args[-1][-1], float)) and args or args[0] |
---|
[710] | 1369 | for window in ws: |
---|
[1554] | 1370 | if len(window) == 1: |
---|
| 1371 | window = [window[0], window[0]] |
---|
| 1372 | if len(window) == 0 or len(window) > 2: |
---|
[2349] | 1373 | raise ValueError("A window needs to be defined as " |
---|
| 1374 | "[start(, end)]") |
---|
[1545] | 1375 | if window[0] > window[1]: |
---|
| 1376 | tmp = window[0] |
---|
| 1377 | window[0] = window[1] |
---|
| 1378 | window[1] = tmp |
---|
[102] | 1379 | for i in range(n): |
---|
[1024] | 1380 | if data[i] >= window[0] and data[i] <= window[1]: |
---|
[1295] | 1381 | msk[i] = True |
---|
[113] | 1382 | if kwargs.has_key('invert'): |
---|
| 1383 | if kwargs.get('invert'): |
---|
[1295] | 1384 | msk = mask_not(msk) |
---|
[102] | 1385 | return msk |
---|
[710] | 1386 | |
---|
[1931] | 1387 | def get_masklist(self, mask=None, row=0, silent=False): |
---|
[1846] | 1388 | """\ |
---|
[1819] | 1389 | Compute and return a list of mask windows, [min, max]. |
---|
[1846] | 1390 | |
---|
[1819] | 1391 | Parameters: |
---|
[1846] | 1392 | |
---|
[1819] | 1393 | mask: channel mask, created with create_mask. |
---|
[1855] | 1394 | |
---|
[1819] | 1395 | row: calcutate the masklist using the specified row |
---|
| 1396 | for unit conversions, default is row=0 |
---|
| 1397 | only necessary if frequency varies over rows. |
---|
[1846] | 1398 | |
---|
[1819] | 1399 | Returns: |
---|
[1846] | 1400 | |
---|
[1819] | 1401 | [min, max], [min2, max2], ... |
---|
| 1402 | Pairs of start/end points (inclusive)specifying |
---|
| 1403 | the masked regions |
---|
[1846] | 1404 | |
---|
[1819] | 1405 | """ |
---|
| 1406 | if not (isinstance(mask,list) or isinstance(mask, tuple)): |
---|
| 1407 | raise TypeError("The mask should be list or tuple.") |
---|
[2427] | 1408 | if len(mask) <= 0: |
---|
| 1409 | raise TypeError("The mask elements should be > 0") |
---|
[2348] | 1410 | data = self._getabcissa(row) |
---|
| 1411 | if len(data) != len(mask): |
---|
[1819] | 1412 | msg = "Number of channels in scantable != number of mask elements" |
---|
| 1413 | raise TypeError(msg) |
---|
| 1414 | u = self._getcoordinfo()[0] |
---|
[1859] | 1415 | if u == "": |
---|
| 1416 | u = "channel" |
---|
| 1417 | msg = "The current mask window unit is %s" % u |
---|
| 1418 | i = self._check_ifs() |
---|
| 1419 | if not i: |
---|
| 1420 | msg += "\nThis mask is only valid for IF=%d" % (self.getif(i)) |
---|
[1931] | 1421 | if not silent: |
---|
| 1422 | asaplog.push(msg) |
---|
[2349] | 1423 | masklist = [] |
---|
[1819] | 1424 | ist, ien = None, None |
---|
| 1425 | ist, ien=self.get_mask_indices(mask) |
---|
| 1426 | if ist is not None and ien is not None: |
---|
| 1427 | for i in xrange(len(ist)): |
---|
| 1428 | range=[data[ist[i]],data[ien[i]]] |
---|
| 1429 | range.sort() |
---|
| 1430 | masklist.append([range[0],range[1]]) |
---|
| 1431 | return masklist |
---|
| 1432 | |
---|
| 1433 | def get_mask_indices(self, mask=None): |
---|
[1846] | 1434 | """\ |
---|
[1819] | 1435 | Compute and Return lists of mask start indices and mask end indices. |
---|
[1855] | 1436 | |
---|
| 1437 | Parameters: |
---|
| 1438 | |
---|
[1819] | 1439 | mask: channel mask, created with create_mask. |
---|
[1846] | 1440 | |
---|
[1819] | 1441 | Returns: |
---|
[1846] | 1442 | |
---|
[1819] | 1443 | List of mask start indices and that of mask end indices, |
---|
| 1444 | i.e., [istart1,istart2,....], [iend1,iend2,....]. |
---|
[1846] | 1445 | |
---|
[1819] | 1446 | """ |
---|
| 1447 | if not (isinstance(mask,list) or isinstance(mask, tuple)): |
---|
| 1448 | raise TypeError("The mask should be list or tuple.") |
---|
[2427] | 1449 | if len(mask) <= 0: |
---|
| 1450 | raise TypeError("The mask elements should be > 0") |
---|
[2349] | 1451 | istart = [] |
---|
| 1452 | iend = [] |
---|
| 1453 | if mask[0]: |
---|
| 1454 | istart.append(0) |
---|
[1819] | 1455 | for i in range(len(mask)-1): |
---|
| 1456 | if not mask[i] and mask[i+1]: |
---|
| 1457 | istart.append(i+1) |
---|
| 1458 | elif mask[i] and not mask[i+1]: |
---|
| 1459 | iend.append(i) |
---|
[2349] | 1460 | if mask[len(mask)-1]: |
---|
| 1461 | iend.append(len(mask)-1) |
---|
[1819] | 1462 | if len(istart) != len(iend): |
---|
| 1463 | raise RuntimeError("Numbers of mask start != mask end.") |
---|
| 1464 | for i in range(len(istart)): |
---|
| 1465 | if istart[i] > iend[i]: |
---|
| 1466 | raise RuntimeError("Mask start index > mask end index") |
---|
| 1467 | break |
---|
| 1468 | return istart,iend |
---|
| 1469 | |
---|
[2013] | 1470 | @asaplog_post_dec |
---|
[2349] | 1471 | def parse_maskexpr(self, maskstring): |
---|
[2013] | 1472 | """ |
---|
| 1473 | Parse CASA type mask selection syntax (IF dependent). |
---|
| 1474 | |
---|
| 1475 | Parameters: |
---|
| 1476 | maskstring : A string mask selection expression. |
---|
| 1477 | A comma separated selections mean different IF - |
---|
| 1478 | channel combinations. IFs and channel selections |
---|
| 1479 | are partitioned by a colon, ':'. |
---|
| 1480 | examples: |
---|
[2015] | 1481 | '' = all IFs (all channels) |
---|
[2013] | 1482 | '<2,4~6,9' = IFs 0,1,4,5,6,9 (all channels) |
---|
| 1483 | '3:3~45;60' = channels 3 to 45 and 60 in IF 3 |
---|
| 1484 | '0~1:2~6,8' = channels 2 to 6 in IFs 0,1, and |
---|
| 1485 | all channels in IF8 |
---|
| 1486 | Returns: |
---|
| 1487 | A dictionary of selected (valid) IF and masklist pairs, |
---|
| 1488 | e.g. {'0': [[50,250],[350,462]], '2': [[100,400],[550,974]]} |
---|
| 1489 | """ |
---|
| 1490 | if not isinstance(maskstring,str): |
---|
| 1491 | asaplog.post() |
---|
[2611] | 1492 | asaplog.push("Mask expression should be a string.") |
---|
[2013] | 1493 | asaplog.post("ERROR") |
---|
| 1494 | |
---|
| 1495 | valid_ifs = self.getifnos() |
---|
| 1496 | frequnit = self.get_unit() |
---|
| 1497 | seldict = {} |
---|
[2015] | 1498 | if maskstring == "": |
---|
| 1499 | maskstring = str(valid_ifs)[1:-1] |
---|
[2611] | 1500 | ## split each selection "IF range[:CHAN range]" |
---|
[2013] | 1501 | sellist = maskstring.split(',') |
---|
| 1502 | for currselstr in sellist: |
---|
| 1503 | selset = currselstr.split(':') |
---|
| 1504 | # spw and mask string (may include ~, < or >) |
---|
[2349] | 1505 | spwmasklist = self._parse_selection(selset[0], typestr='integer', |
---|
[2611] | 1506 | minval=min(valid_ifs), |
---|
[2349] | 1507 | maxval=max(valid_ifs)) |
---|
[2013] | 1508 | for spwlist in spwmasklist: |
---|
| 1509 | selspws = [] |
---|
| 1510 | for ispw in range(spwlist[0],spwlist[1]+1): |
---|
| 1511 | # Put into the list only if ispw exists |
---|
| 1512 | if valid_ifs.count(ispw): |
---|
| 1513 | selspws.append(ispw) |
---|
| 1514 | del spwmasklist, spwlist |
---|
| 1515 | |
---|
| 1516 | # parse frequency mask list |
---|
| 1517 | if len(selset) > 1: |
---|
[2349] | 1518 | freqmasklist = self._parse_selection(selset[1], typestr='float', |
---|
| 1519 | offset=0.) |
---|
[2013] | 1520 | else: |
---|
| 1521 | # want to select the whole spectrum |
---|
| 1522 | freqmasklist = [None] |
---|
| 1523 | |
---|
| 1524 | ## define a dictionary of spw - masklist combination |
---|
| 1525 | for ispw in selspws: |
---|
| 1526 | #print "working on", ispw |
---|
| 1527 | spwstr = str(ispw) |
---|
| 1528 | if len(selspws) == 0: |
---|
| 1529 | # empty spw |
---|
| 1530 | continue |
---|
| 1531 | else: |
---|
| 1532 | ## want to get min and max of the spw and |
---|
| 1533 | ## offset to set for '<' and '>' |
---|
| 1534 | if frequnit == 'channel': |
---|
| 1535 | minfreq = 0 |
---|
| 1536 | maxfreq = self.nchan(ifno=ispw) |
---|
| 1537 | offset = 0.5 |
---|
| 1538 | else: |
---|
| 1539 | ## This is ugly part. need improvement |
---|
| 1540 | for ifrow in xrange(self.nrow()): |
---|
| 1541 | if self.getif(ifrow) == ispw: |
---|
| 1542 | #print "IF",ispw,"found in row =",ifrow |
---|
| 1543 | break |
---|
| 1544 | freqcoord = self.get_coordinate(ifrow) |
---|
| 1545 | freqs = self._getabcissa(ifrow) |
---|
| 1546 | minfreq = min(freqs) |
---|
| 1547 | maxfreq = max(freqs) |
---|
| 1548 | if len(freqs) == 1: |
---|
| 1549 | offset = 0.5 |
---|
| 1550 | elif frequnit.find('Hz') > 0: |
---|
[2349] | 1551 | offset = abs(freqcoord.to_frequency(1, |
---|
| 1552 | unit=frequnit) |
---|
| 1553 | -freqcoord.to_frequency(0, |
---|
| 1554 | unit=frequnit) |
---|
| 1555 | )*0.5 |
---|
[2013] | 1556 | elif frequnit.find('m/s') > 0: |
---|
[2349] | 1557 | offset = abs(freqcoord.to_velocity(1, |
---|
| 1558 | unit=frequnit) |
---|
| 1559 | -freqcoord.to_velocity(0, |
---|
| 1560 | unit=frequnit) |
---|
| 1561 | )*0.5 |
---|
[2013] | 1562 | else: |
---|
| 1563 | asaplog.post() |
---|
| 1564 | asaplog.push("Invalid frequency unit") |
---|
| 1565 | asaplog.post("ERROR") |
---|
| 1566 | del freqs, freqcoord, ifrow |
---|
| 1567 | for freq in freqmasklist: |
---|
| 1568 | selmask = freq or [minfreq, maxfreq] |
---|
| 1569 | if selmask[0] == None: |
---|
| 1570 | ## selection was "<freq[1]". |
---|
| 1571 | if selmask[1] < minfreq: |
---|
| 1572 | ## avoid adding region selection |
---|
| 1573 | selmask = None |
---|
| 1574 | else: |
---|
| 1575 | selmask = [minfreq,selmask[1]-offset] |
---|
| 1576 | elif selmask[1] == None: |
---|
| 1577 | ## selection was ">freq[0]" |
---|
| 1578 | if selmask[0] > maxfreq: |
---|
| 1579 | ## avoid adding region selection |
---|
| 1580 | selmask = None |
---|
| 1581 | else: |
---|
| 1582 | selmask = [selmask[0]+offset,maxfreq] |
---|
| 1583 | if selmask: |
---|
| 1584 | if not seldict.has_key(spwstr): |
---|
| 1585 | # new spw selection |
---|
| 1586 | seldict[spwstr] = [] |
---|
| 1587 | seldict[spwstr] += [selmask] |
---|
| 1588 | del minfreq,maxfreq,offset,freq,selmask |
---|
| 1589 | del spwstr |
---|
| 1590 | del freqmasklist |
---|
| 1591 | del valid_ifs |
---|
| 1592 | if len(seldict) == 0: |
---|
| 1593 | asaplog.post() |
---|
[2349] | 1594 | asaplog.push("No valid selection in the mask expression: " |
---|
| 1595 | +maskstring) |
---|
[2013] | 1596 | asaplog.post("WARN") |
---|
| 1597 | return None |
---|
| 1598 | msg = "Selected masklist:\n" |
---|
| 1599 | for sif, lmask in seldict.iteritems(): |
---|
| 1600 | msg += " IF"+sif+" - "+str(lmask)+"\n" |
---|
| 1601 | asaplog.push(msg) |
---|
| 1602 | return seldict |
---|
| 1603 | |
---|
[2611] | 1604 | @asaplog_post_dec |
---|
| 1605 | def parse_idx_selection(self, mode, selexpr): |
---|
| 1606 | """ |
---|
| 1607 | Parse CASA type mask selection syntax of SCANNO, IFNO, POLNO, |
---|
| 1608 | BEAMNO, and row number |
---|
| 1609 | |
---|
| 1610 | Parameters: |
---|
| 1611 | mode : which column to select. |
---|
| 1612 | ['scan',|'if'|'pol'|'beam'|'row'] |
---|
| 1613 | selexpr : A comma separated selection expression. |
---|
| 1614 | examples: |
---|
| 1615 | '' = all (returns []) |
---|
| 1616 | '<2,4~6,9' = indices less than 2, 4 to 6 and 9 |
---|
| 1617 | (returns [0,1,4,5,6,9]) |
---|
| 1618 | Returns: |
---|
| 1619 | A List of selected indices |
---|
| 1620 | """ |
---|
| 1621 | if selexpr == "": |
---|
| 1622 | return [] |
---|
| 1623 | valid_modes = {'s': 'scan', 'i': 'if', 'p': 'pol', |
---|
| 1624 | 'b': 'beam', 'r': 'row'} |
---|
| 1625 | smode = mode.lower()[0] |
---|
| 1626 | if not (smode in valid_modes.keys()): |
---|
| 1627 | msg = "Invalid mode '%s'. Valid modes are %s" %\ |
---|
| 1628 | (mode, str(valid_modes.values())) |
---|
| 1629 | asaplog.post() |
---|
| 1630 | asaplog.push(msg) |
---|
| 1631 | asaplog.post("ERROR") |
---|
| 1632 | mode = valid_modes[smode] |
---|
| 1633 | minidx = None |
---|
| 1634 | maxidx = None |
---|
| 1635 | if smode == 'r': |
---|
| 1636 | minidx = 0 |
---|
| 1637 | maxidx = self.nrow() |
---|
| 1638 | else: |
---|
| 1639 | idx = getattr(self,"get"+mode+"nos")() |
---|
| 1640 | minidx = min(idx) |
---|
| 1641 | maxidx = max(idx) |
---|
| 1642 | del idx |
---|
| 1643 | sellist = selexpr.split(',') |
---|
| 1644 | idxlist = [] |
---|
| 1645 | for currselstr in sellist: |
---|
| 1646 | # single range (may include ~, < or >) |
---|
| 1647 | currlist = self._parse_selection(currselstr, typestr='integer', |
---|
| 1648 | minval=minidx,maxval=maxidx) |
---|
| 1649 | for thelist in currlist: |
---|
| 1650 | idxlist += range(thelist[0],thelist[1]+1) |
---|
| 1651 | msg = "Selected %s: %s" % (mode.upper()+"NO", str(idxlist)) |
---|
| 1652 | asaplog.push(msg) |
---|
| 1653 | return idxlist |
---|
| 1654 | |
---|
[2349] | 1655 | def _parse_selection(self, selstr, typestr='float', offset=0., |
---|
[2351] | 1656 | minval=None, maxval=None): |
---|
[2013] | 1657 | """ |
---|
| 1658 | Parameters: |
---|
| 1659 | selstr : The Selection string, e.g., '<3;5~7;100~103;9' |
---|
| 1660 | typestr : The type of the values in returned list |
---|
| 1661 | ('integer' or 'float') |
---|
| 1662 | offset : The offset value to subtract from or add to |
---|
| 1663 | the boundary value if the selection string |
---|
[2611] | 1664 | includes '<' or '>' [Valid only for typestr='float'] |
---|
[2013] | 1665 | minval, maxval : The minimum/maximum values to set if the |
---|
| 1666 | selection string includes '<' or '>'. |
---|
| 1667 | The list element is filled with None by default. |
---|
| 1668 | Returns: |
---|
| 1669 | A list of min/max pair of selections. |
---|
| 1670 | Example: |
---|
[2611] | 1671 | _parse_selection('<3;5~7;9',typestr='int',minval=0) |
---|
| 1672 | --> returns [[0,2],[5,7],[9,9]] |
---|
| 1673 | _parse_selection('<3;5~7;9',typestr='float',offset=0.5,minval=0) |
---|
| 1674 | --> returns [[0.,2.5],[5.0,7.0],[9.,9.]] |
---|
[2013] | 1675 | """ |
---|
| 1676 | selgroups = selstr.split(';') |
---|
| 1677 | sellists = [] |
---|
| 1678 | if typestr.lower().startswith('int'): |
---|
| 1679 | formatfunc = int |
---|
[2611] | 1680 | offset = 1 |
---|
[2013] | 1681 | else: |
---|
| 1682 | formatfunc = float |
---|
| 1683 | |
---|
| 1684 | for currsel in selgroups: |
---|
| 1685 | if currsel.find('~') > 0: |
---|
[2611] | 1686 | # val0 <= x <= val1 |
---|
[2013] | 1687 | minsel = formatfunc(currsel.split('~')[0].strip()) |
---|
| 1688 | maxsel = formatfunc(currsel.split('~')[1].strip()) |
---|
[2611] | 1689 | elif currsel.strip().find('<=') > -1: |
---|
| 1690 | bound = currsel.split('<=') |
---|
| 1691 | try: # try "x <= val" |
---|
| 1692 | minsel = minval |
---|
| 1693 | maxsel = formatfunc(bound[1].strip()) |
---|
| 1694 | except ValueError: # now "val <= x" |
---|
| 1695 | minsel = formatfunc(bound[0].strip()) |
---|
| 1696 | maxsel = maxval |
---|
| 1697 | elif currsel.strip().find('>=') > -1: |
---|
| 1698 | bound = currsel.split('>=') |
---|
| 1699 | try: # try "x >= val" |
---|
| 1700 | minsel = formatfunc(bound[1].strip()) |
---|
| 1701 | maxsel = maxval |
---|
| 1702 | except ValueError: # now "val >= x" |
---|
| 1703 | minsel = minval |
---|
| 1704 | maxsel = formatfunc(bound[0].strip()) |
---|
| 1705 | elif currsel.strip().find('<') > -1: |
---|
| 1706 | bound = currsel.split('<') |
---|
| 1707 | try: # try "x < val" |
---|
| 1708 | minsel = minval |
---|
| 1709 | maxsel = formatfunc(bound[1].strip()) \ |
---|
| 1710 | - formatfunc(offset) |
---|
| 1711 | except ValueError: # now "val < x" |
---|
| 1712 | minsel = formatfunc(bound[0].strip()) \ |
---|
[2013] | 1713 | + formatfunc(offset) |
---|
[2611] | 1714 | maxsel = maxval |
---|
| 1715 | elif currsel.strip().find('>') > -1: |
---|
| 1716 | bound = currsel.split('>') |
---|
| 1717 | try: # try "x > val" |
---|
| 1718 | minsel = formatfunc(bound[1].strip()) \ |
---|
| 1719 | + formatfunc(offset) |
---|
| 1720 | maxsel = maxval |
---|
| 1721 | except ValueError: # now "val > x" |
---|
| 1722 | minsel = minval |
---|
| 1723 | maxsel = formatfunc(bound[0].strip()) \ |
---|
| 1724 | - formatfunc(offset) |
---|
[2013] | 1725 | else: |
---|
| 1726 | minsel = formatfunc(currsel) |
---|
| 1727 | maxsel = formatfunc(currsel) |
---|
| 1728 | sellists.append([minsel,maxsel]) |
---|
| 1729 | return sellists |
---|
| 1730 | |
---|
[1819] | 1731 | # def get_restfreqs(self): |
---|
| 1732 | # """ |
---|
| 1733 | # Get the restfrequency(s) stored in this scantable. |
---|
| 1734 | # The return value(s) are always of unit 'Hz' |
---|
| 1735 | # Parameters: |
---|
| 1736 | # none |
---|
| 1737 | # Returns: |
---|
| 1738 | # a list of doubles |
---|
| 1739 | # """ |
---|
| 1740 | # return list(self._getrestfreqs()) |
---|
| 1741 | |
---|
| 1742 | def get_restfreqs(self, ids=None): |
---|
[1846] | 1743 | """\ |
---|
[256] | 1744 | Get the restfrequency(s) stored in this scantable. |
---|
| 1745 | The return value(s) are always of unit 'Hz' |
---|
[1846] | 1746 | |
---|
[256] | 1747 | Parameters: |
---|
[1846] | 1748 | |
---|
[1819] | 1749 | ids: (optional) a list of MOLECULE_ID for that restfrequency(s) to |
---|
| 1750 | be retrieved |
---|
[1846] | 1751 | |
---|
[256] | 1752 | Returns: |
---|
[1846] | 1753 | |
---|
[1819] | 1754 | dictionary containing ids and a list of doubles for each id |
---|
[1846] | 1755 | |
---|
[256] | 1756 | """ |
---|
[1819] | 1757 | if ids is None: |
---|
[2349] | 1758 | rfreqs = {} |
---|
[1819] | 1759 | idlist = self.getmolnos() |
---|
| 1760 | for i in idlist: |
---|
[2349] | 1761 | rfreqs[i] = list(self._getrestfreqs(i)) |
---|
[1819] | 1762 | return rfreqs |
---|
| 1763 | else: |
---|
[2349] | 1764 | if type(ids) == list or type(ids) == tuple: |
---|
| 1765 | rfreqs = {} |
---|
[1819] | 1766 | for i in ids: |
---|
[2349] | 1767 | rfreqs[i] = list(self._getrestfreqs(i)) |
---|
[1819] | 1768 | return rfreqs |
---|
| 1769 | else: |
---|
| 1770 | return list(self._getrestfreqs(ids)) |
---|
[102] | 1771 | |
---|
[2349] | 1772 | @asaplog_post_dec |
---|
[931] | 1773 | def set_restfreqs(self, freqs=None, unit='Hz'): |
---|
[1846] | 1774 | """\ |
---|
[931] | 1775 | Set or replace the restfrequency specified and |
---|
[1938] | 1776 | if the 'freqs' argument holds a scalar, |
---|
[931] | 1777 | then that rest frequency will be applied to all the selected |
---|
| 1778 | data. If the 'freqs' argument holds |
---|
| 1779 | a vector, then it MUST be of equal or smaller length than |
---|
| 1780 | the number of IFs (and the available restfrequencies will be |
---|
| 1781 | replaced by this vector). In this case, *all* data have |
---|
| 1782 | the restfrequency set per IF according |
---|
| 1783 | to the corresponding value you give in the 'freqs' vector. |
---|
[1118] | 1784 | E.g. 'freqs=[1e9, 2e9]' would mean IF 0 gets restfreq 1e9 and |
---|
[931] | 1785 | IF 1 gets restfreq 2e9. |
---|
[1846] | 1786 | |
---|
[1395] | 1787 | You can also specify the frequencies via a linecatalog. |
---|
[1153] | 1788 | |
---|
[931] | 1789 | Parameters: |
---|
[1846] | 1790 | |
---|
[931] | 1791 | freqs: list of rest frequency values or string idenitfiers |
---|
[1855] | 1792 | |
---|
[931] | 1793 | unit: unit for rest frequency (default 'Hz') |
---|
[402] | 1794 | |
---|
[1846] | 1795 | |
---|
| 1796 | Example:: |
---|
| 1797 | |
---|
[1819] | 1798 | # set the given restfrequency for the all currently selected IFs |
---|
[931] | 1799 | scan.set_restfreqs(freqs=1.4e9) |
---|
[1845] | 1800 | # set restfrequencies for the n IFs (n > 1) in the order of the |
---|
| 1801 | # list, i.e |
---|
| 1802 | # IF0 -> 1.4e9, IF1 -> 1.41e9, IF3 -> 1.42e9 |
---|
| 1803 | # len(list_of_restfreqs) == nIF |
---|
| 1804 | # for nIF == 1 the following will set multiple restfrequency for |
---|
| 1805 | # that IF |
---|
[1819] | 1806 | scan.set_restfreqs(freqs=[1.4e9, 1.41e9, 1.42e9]) |
---|
[1845] | 1807 | # set multiple restfrequencies per IF. as a list of lists where |
---|
| 1808 | # the outer list has nIF elements, the inner s arbitrary |
---|
| 1809 | scan.set_restfreqs(freqs=[[1.4e9, 1.41e9], [1.67e9]]) |
---|
[391] | 1810 | |
---|
[1846] | 1811 | *Note*: |
---|
[1845] | 1812 | |
---|
[931] | 1813 | To do more sophisticate Restfrequency setting, e.g. on a |
---|
| 1814 | source and IF basis, use scantable.set_selection() before using |
---|
[1846] | 1815 | this function:: |
---|
[931] | 1816 | |
---|
[1846] | 1817 | # provided your scantable is called scan |
---|
| 1818 | selection = selector() |
---|
[2431] | 1819 | selection.set_name('ORION*') |
---|
[1846] | 1820 | selection.set_ifs([1]) |
---|
| 1821 | scan.set_selection(selection) |
---|
| 1822 | scan.set_restfreqs(freqs=86.6e9) |
---|
| 1823 | |
---|
[931] | 1824 | """ |
---|
| 1825 | varlist = vars() |
---|
[1157] | 1826 | from asap import linecatalog |
---|
| 1827 | # simple value |
---|
[1118] | 1828 | if isinstance(freqs, int) or isinstance(freqs, float): |
---|
[1845] | 1829 | self._setrestfreqs([freqs], [""], unit) |
---|
[1157] | 1830 | # list of values |
---|
[1118] | 1831 | elif isinstance(freqs, list) or isinstance(freqs, tuple): |
---|
[1157] | 1832 | # list values are scalars |
---|
[1118] | 1833 | if isinstance(freqs[-1], int) or isinstance(freqs[-1], float): |
---|
[1845] | 1834 | if len(freqs) == 1: |
---|
| 1835 | self._setrestfreqs(freqs, [""], unit) |
---|
| 1836 | else: |
---|
| 1837 | # allow the 'old' mode of setting mulitple IFs |
---|
| 1838 | savesel = self._getselection() |
---|
[2599] | 1839 | sel = self.get_selection() |
---|
[1845] | 1840 | iflist = self.getifnos() |
---|
| 1841 | if len(freqs)>len(iflist): |
---|
| 1842 | raise ValueError("number of elements in list of list " |
---|
| 1843 | "exeeds the current IF selections") |
---|
| 1844 | iflist = self.getifnos() |
---|
| 1845 | for i, fval in enumerate(freqs): |
---|
| 1846 | sel.set_ifs(iflist[i]) |
---|
| 1847 | self._setselection(sel) |
---|
| 1848 | self._setrestfreqs([fval], [""], unit) |
---|
| 1849 | self._setselection(savesel) |
---|
| 1850 | |
---|
| 1851 | # list values are dict, {'value'=, 'name'=) |
---|
[1157] | 1852 | elif isinstance(freqs[-1], dict): |
---|
[1845] | 1853 | values = [] |
---|
| 1854 | names = [] |
---|
| 1855 | for d in freqs: |
---|
| 1856 | values.append(d["value"]) |
---|
| 1857 | names.append(d["name"]) |
---|
| 1858 | self._setrestfreqs(values, names, unit) |
---|
[1819] | 1859 | elif isinstance(freqs[-1], list) or isinstance(freqs[-1], tuple): |
---|
[1157] | 1860 | savesel = self._getselection() |
---|
[2599] | 1861 | sel = self.get_selection() |
---|
[1322] | 1862 | iflist = self.getifnos() |
---|
[1819] | 1863 | if len(freqs)>len(iflist): |
---|
[1845] | 1864 | raise ValueError("number of elements in list of list exeeds" |
---|
| 1865 | " the current IF selections") |
---|
| 1866 | for i, fval in enumerate(freqs): |
---|
[1322] | 1867 | sel.set_ifs(iflist[i]) |
---|
[1259] | 1868 | self._setselection(sel) |
---|
[1845] | 1869 | self._setrestfreqs(fval, [""], unit) |
---|
[1157] | 1870 | self._setselection(savesel) |
---|
| 1871 | # freqs are to be taken from a linecatalog |
---|
[1153] | 1872 | elif isinstance(freqs, linecatalog): |
---|
| 1873 | savesel = self._getselection() |
---|
[2599] | 1874 | sel = self.get_selection() |
---|
[1153] | 1875 | for i in xrange(freqs.nrow()): |
---|
[1322] | 1876 | sel.set_ifs(iflist[i]) |
---|
[1153] | 1877 | self._setselection(sel) |
---|
[1845] | 1878 | self._setrestfreqs([freqs.get_frequency(i)], |
---|
| 1879 | [freqs.get_name(i)], "MHz") |
---|
[1153] | 1880 | # ensure that we are not iterating past nIF |
---|
| 1881 | if i == self.nif()-1: break |
---|
| 1882 | self._setselection(savesel) |
---|
[931] | 1883 | else: |
---|
| 1884 | return |
---|
| 1885 | self._add_history("set_restfreqs", varlist) |
---|
| 1886 | |
---|
[2349] | 1887 | @asaplog_post_dec |
---|
[1360] | 1888 | def shift_refpix(self, delta): |
---|
[1846] | 1889 | """\ |
---|
[1589] | 1890 | Shift the reference pixel of the Spectra Coordinate by an |
---|
| 1891 | integer amount. |
---|
[1846] | 1892 | |
---|
[1589] | 1893 | Parameters: |
---|
[1846] | 1894 | |
---|
[1589] | 1895 | delta: the amount to shift by |
---|
[1846] | 1896 | |
---|
| 1897 | *Note*: |
---|
| 1898 | |
---|
[1589] | 1899 | Be careful using this with broadband data. |
---|
[1846] | 1900 | |
---|
[1360] | 1901 | """ |
---|
[2349] | 1902 | varlist = vars() |
---|
[1731] | 1903 | Scantable.shift_refpix(self, delta) |
---|
[2349] | 1904 | s._add_history("shift_refpix", varlist) |
---|
[931] | 1905 | |
---|
[1862] | 1906 | @asaplog_post_dec |
---|
[1259] | 1907 | def history(self, filename=None): |
---|
[1846] | 1908 | """\ |
---|
[1259] | 1909 | Print the history. Optionally to a file. |
---|
[1846] | 1910 | |
---|
[1348] | 1911 | Parameters: |
---|
[1846] | 1912 | |
---|
[1928] | 1913 | filename: The name of the file to save the history to. |
---|
[1846] | 1914 | |
---|
[1259] | 1915 | """ |
---|
[484] | 1916 | hist = list(self._gethistory()) |
---|
[794] | 1917 | out = "-"*80 |
---|
[484] | 1918 | for h in hist: |
---|
[489] | 1919 | if h.startswith("---"): |
---|
[1857] | 1920 | out = "\n".join([out, h]) |
---|
[489] | 1921 | else: |
---|
| 1922 | items = h.split("##") |
---|
| 1923 | date = items[0] |
---|
| 1924 | func = items[1] |
---|
| 1925 | items = items[2:] |
---|
[794] | 1926 | out += "\n"+date+"\n" |
---|
| 1927 | out += "Function: %s\n Parameters:" % (func) |
---|
[489] | 1928 | for i in items: |
---|
[1938] | 1929 | if i == '': |
---|
| 1930 | continue |
---|
[489] | 1931 | s = i.split("=") |
---|
[1118] | 1932 | out += "\n %s = %s" % (s[0], s[1]) |
---|
[1857] | 1933 | out = "\n".join([out, "-"*80]) |
---|
[1259] | 1934 | if filename is not None: |
---|
| 1935 | if filename is "": |
---|
| 1936 | filename = 'scantable_history.txt' |
---|
| 1937 | import os |
---|
| 1938 | filename = os.path.expandvars(os.path.expanduser(filename)) |
---|
| 1939 | if not os.path.isdir(filename): |
---|
| 1940 | data = open(filename, 'w') |
---|
| 1941 | data.write(out) |
---|
| 1942 | data.close() |
---|
| 1943 | else: |
---|
| 1944 | msg = "Illegal file name '%s'." % (filename) |
---|
[1859] | 1945 | raise IOError(msg) |
---|
| 1946 | return page(out) |
---|
[2349] | 1947 | |
---|
[513] | 1948 | # |
---|
| 1949 | # Maths business |
---|
| 1950 | # |
---|
[1862] | 1951 | @asaplog_post_dec |
---|
[931] | 1952 | def average_time(self, mask=None, scanav=False, weight='tint', align=False): |
---|
[1846] | 1953 | """\ |
---|
[2349] | 1954 | Return the (time) weighted average of a scan. Scans will be averaged |
---|
| 1955 | only if the source direction (RA/DEC) is within 1' otherwise |
---|
[1846] | 1956 | |
---|
| 1957 | *Note*: |
---|
| 1958 | |
---|
[1070] | 1959 | in channels only - align if necessary |
---|
[1846] | 1960 | |
---|
[513] | 1961 | Parameters: |
---|
[1846] | 1962 | |
---|
[513] | 1963 | mask: an optional mask (only used for 'var' and 'tsys' |
---|
| 1964 | weighting) |
---|
[1855] | 1965 | |
---|
[558] | 1966 | scanav: True averages each scan separately |
---|
| 1967 | False (default) averages all scans together, |
---|
[1855] | 1968 | |
---|
[1099] | 1969 | weight: Weighting scheme. |
---|
| 1970 | 'none' (mean no weight) |
---|
| 1971 | 'var' (1/var(spec) weighted) |
---|
| 1972 | 'tsys' (1/Tsys**2 weighted) |
---|
| 1973 | 'tint' (integration time weighted) |
---|
| 1974 | 'tintsys' (Tint/Tsys**2) |
---|
| 1975 | 'median' ( median averaging) |
---|
[535] | 1976 | The default is 'tint' |
---|
[1855] | 1977 | |
---|
[931] | 1978 | align: align the spectra in velocity before averaging. It takes |
---|
| 1979 | the time of the first spectrum as reference time. |
---|
[1846] | 1980 | |
---|
| 1981 | Example:: |
---|
| 1982 | |
---|
[513] | 1983 | # time average the scantable without using a mask |
---|
[710] | 1984 | newscan = scan.average_time() |
---|
[1846] | 1985 | |
---|
[513] | 1986 | """ |
---|
| 1987 | varlist = vars() |
---|
[1593] | 1988 | weight = weight or 'TINT' |
---|
| 1989 | mask = mask or () |
---|
| 1990 | scanav = (scanav and 'SCAN') or 'NONE' |
---|
[1118] | 1991 | scan = (self, ) |
---|
[1859] | 1992 | |
---|
| 1993 | if align: |
---|
| 1994 | scan = (self.freq_align(insitu=False), ) |
---|
| 1995 | s = None |
---|
| 1996 | if weight.upper() == 'MEDIAN': |
---|
| 1997 | s = scantable(self._math._averagechannel(scan[0], 'MEDIAN', |
---|
| 1998 | scanav)) |
---|
| 1999 | else: |
---|
| 2000 | s = scantable(self._math._average(scan, mask, weight.upper(), |
---|
| 2001 | scanav)) |
---|
[1099] | 2002 | s._add_history("average_time", varlist) |
---|
[513] | 2003 | return s |
---|
[710] | 2004 | |
---|
[1862] | 2005 | @asaplog_post_dec |
---|
[876] | 2006 | def convert_flux(self, jyperk=None, eta=None, d=None, insitu=None): |
---|
[1846] | 2007 | """\ |
---|
[513] | 2008 | Return a scan where all spectra are converted to either |
---|
| 2009 | Jansky or Kelvin depending upon the flux units of the scan table. |
---|
| 2010 | By default the function tries to look the values up internally. |
---|
| 2011 | If it can't find them (or if you want to over-ride), you must |
---|
| 2012 | specify EITHER jyperk OR eta (and D which it will try to look up |
---|
| 2013 | also if you don't set it). jyperk takes precedence if you set both. |
---|
[1846] | 2014 | |
---|
[513] | 2015 | Parameters: |
---|
[1846] | 2016 | |
---|
[513] | 2017 | jyperk: the Jy / K conversion factor |
---|
[1855] | 2018 | |
---|
[513] | 2019 | eta: the aperture efficiency |
---|
[1855] | 2020 | |
---|
[1928] | 2021 | d: the geometric diameter (metres) |
---|
[1855] | 2022 | |
---|
[513] | 2023 | insitu: if False a new scantable is returned. |
---|
| 2024 | Otherwise, the scaling is done in-situ |
---|
| 2025 | The default is taken from .asaprc (False) |
---|
[1846] | 2026 | |
---|
[513] | 2027 | """ |
---|
| 2028 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 2029 | self._math._setinsitu(insitu) |
---|
[513] | 2030 | varlist = vars() |
---|
[1593] | 2031 | jyperk = jyperk or -1.0 |
---|
| 2032 | d = d or -1.0 |
---|
| 2033 | eta = eta or -1.0 |
---|
[876] | 2034 | s = scantable(self._math._convertflux(self, d, eta, jyperk)) |
---|
| 2035 | s._add_history("convert_flux", varlist) |
---|
| 2036 | if insitu: self._assign(s) |
---|
| 2037 | else: return s |
---|
[513] | 2038 | |
---|
[1862] | 2039 | @asaplog_post_dec |
---|
[876] | 2040 | def gain_el(self, poly=None, filename="", method="linear", insitu=None): |
---|
[1846] | 2041 | """\ |
---|
[513] | 2042 | Return a scan after applying a gain-elevation correction. |
---|
| 2043 | The correction can be made via either a polynomial or a |
---|
| 2044 | table-based interpolation (and extrapolation if necessary). |
---|
| 2045 | You specify polynomial coefficients, an ascii table or neither. |
---|
| 2046 | If you specify neither, then a polynomial correction will be made |
---|
| 2047 | with built in coefficients known for certain telescopes (an error |
---|
| 2048 | will occur if the instrument is not known). |
---|
| 2049 | The data and Tsys are *divided* by the scaling factors. |
---|
[1846] | 2050 | |
---|
[513] | 2051 | Parameters: |
---|
[1846] | 2052 | |
---|
[513] | 2053 | poly: Polynomial coefficients (default None) to compute a |
---|
| 2054 | gain-elevation correction as a function of |
---|
| 2055 | elevation (in degrees). |
---|
[1855] | 2056 | |
---|
[513] | 2057 | filename: The name of an ascii file holding correction factors. |
---|
| 2058 | The first row of the ascii file must give the column |
---|
| 2059 | names and these MUST include columns |
---|
[2431] | 2060 | 'ELEVATION' (degrees) and 'FACTOR' (multiply data |
---|
[513] | 2061 | by this) somewhere. |
---|
| 2062 | The second row must give the data type of the |
---|
| 2063 | column. Use 'R' for Real and 'I' for Integer. |
---|
| 2064 | An example file would be |
---|
| 2065 | (actual factors are arbitrary) : |
---|
| 2066 | |
---|
| 2067 | TIME ELEVATION FACTOR |
---|
| 2068 | R R R |
---|
| 2069 | 0.1 0 0.8 |
---|
| 2070 | 0.2 20 0.85 |
---|
| 2071 | 0.3 40 0.9 |
---|
| 2072 | 0.4 60 0.85 |
---|
| 2073 | 0.5 80 0.8 |
---|
| 2074 | 0.6 90 0.75 |
---|
[1855] | 2075 | |
---|
[513] | 2076 | method: Interpolation method when correcting from a table. |
---|
[2431] | 2077 | Values are 'nearest', 'linear' (default), 'cubic' |
---|
| 2078 | and 'spline' |
---|
[1855] | 2079 | |
---|
[513] | 2080 | insitu: if False a new scantable is returned. |
---|
| 2081 | Otherwise, the scaling is done in-situ |
---|
| 2082 | The default is taken from .asaprc (False) |
---|
[1846] | 2083 | |
---|
[513] | 2084 | """ |
---|
| 2085 | |
---|
| 2086 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 2087 | self._math._setinsitu(insitu) |
---|
[513] | 2088 | varlist = vars() |
---|
[1593] | 2089 | poly = poly or () |
---|
[513] | 2090 | from os.path import expandvars |
---|
| 2091 | filename = expandvars(filename) |
---|
[876] | 2092 | s = scantable(self._math._gainel(self, poly, filename, method)) |
---|
| 2093 | s._add_history("gain_el", varlist) |
---|
[1593] | 2094 | if insitu: |
---|
| 2095 | self._assign(s) |
---|
| 2096 | else: |
---|
| 2097 | return s |
---|
[710] | 2098 | |
---|
[1862] | 2099 | @asaplog_post_dec |
---|
[931] | 2100 | def freq_align(self, reftime=None, method='cubic', insitu=None): |
---|
[1846] | 2101 | """\ |
---|
[513] | 2102 | Return a scan where all rows have been aligned in frequency/velocity. |
---|
| 2103 | The alignment frequency frame (e.g. LSRK) is that set by function |
---|
| 2104 | set_freqframe. |
---|
[1846] | 2105 | |
---|
[513] | 2106 | Parameters: |
---|
[1855] | 2107 | |
---|
[513] | 2108 | reftime: reference time to align at. By default, the time of |
---|
| 2109 | the first row of data is used. |
---|
[1855] | 2110 | |
---|
[513] | 2111 | method: Interpolation method for regridding the spectra. |
---|
[2431] | 2112 | Choose from 'nearest', 'linear', 'cubic' (default) |
---|
| 2113 | and 'spline' |
---|
[1855] | 2114 | |
---|
[513] | 2115 | insitu: if False a new scantable is returned. |
---|
| 2116 | Otherwise, the scaling is done in-situ |
---|
| 2117 | The default is taken from .asaprc (False) |
---|
[1846] | 2118 | |
---|
[513] | 2119 | """ |
---|
[931] | 2120 | if insitu is None: insitu = rcParams["insitu"] |
---|
[2429] | 2121 | oldInsitu = self._math._insitu() |
---|
[876] | 2122 | self._math._setinsitu(insitu) |
---|
[513] | 2123 | varlist = vars() |
---|
[1593] | 2124 | reftime = reftime or "" |
---|
[931] | 2125 | s = scantable(self._math._freq_align(self, reftime, method)) |
---|
[876] | 2126 | s._add_history("freq_align", varlist) |
---|
[2429] | 2127 | self._math._setinsitu(oldInsitu) |
---|
[2349] | 2128 | if insitu: |
---|
| 2129 | self._assign(s) |
---|
| 2130 | else: |
---|
| 2131 | return s |
---|
[513] | 2132 | |
---|
[1862] | 2133 | @asaplog_post_dec |
---|
[1725] | 2134 | def opacity(self, tau=None, insitu=None): |
---|
[1846] | 2135 | """\ |
---|
[513] | 2136 | Apply an opacity correction. The data |
---|
| 2137 | and Tsys are multiplied by the correction factor. |
---|
[1846] | 2138 | |
---|
[513] | 2139 | Parameters: |
---|
[1855] | 2140 | |
---|
[1689] | 2141 | tau: (list of) opacity from which the correction factor is |
---|
[513] | 2142 | exp(tau*ZD) |
---|
[1689] | 2143 | where ZD is the zenith-distance. |
---|
| 2144 | If a list is provided, it has to be of length nIF, |
---|
| 2145 | nIF*nPol or 1 and in order of IF/POL, e.g. |
---|
| 2146 | [opif0pol0, opif0pol1, opif1pol0 ...] |
---|
[1725] | 2147 | if tau is `None` the opacities are determined from a |
---|
| 2148 | model. |
---|
[1855] | 2149 | |
---|
[513] | 2150 | insitu: if False a new scantable is returned. |
---|
| 2151 | Otherwise, the scaling is done in-situ |
---|
| 2152 | The default is taken from .asaprc (False) |
---|
[1846] | 2153 | |
---|
[513] | 2154 | """ |
---|
[2349] | 2155 | if insitu is None: |
---|
| 2156 | insitu = rcParams['insitu'] |
---|
[876] | 2157 | self._math._setinsitu(insitu) |
---|
[513] | 2158 | varlist = vars() |
---|
[1689] | 2159 | if not hasattr(tau, "__len__"): |
---|
| 2160 | tau = [tau] |
---|
[876] | 2161 | s = scantable(self._math._opacity(self, tau)) |
---|
| 2162 | s._add_history("opacity", varlist) |
---|
[2349] | 2163 | if insitu: |
---|
| 2164 | self._assign(s) |
---|
| 2165 | else: |
---|
| 2166 | return s |
---|
[513] | 2167 | |
---|
[1862] | 2168 | @asaplog_post_dec |
---|
[513] | 2169 | def bin(self, width=5, insitu=None): |
---|
[1846] | 2170 | """\ |
---|
[513] | 2171 | Return a scan where all spectra have been binned up. |
---|
[1846] | 2172 | |
---|
[1348] | 2173 | Parameters: |
---|
[1846] | 2174 | |
---|
[513] | 2175 | width: The bin width (default=5) in pixels |
---|
[1855] | 2176 | |
---|
[513] | 2177 | insitu: if False a new scantable is returned. |
---|
| 2178 | Otherwise, the scaling is done in-situ |
---|
| 2179 | The default is taken from .asaprc (False) |
---|
[1846] | 2180 | |
---|
[513] | 2181 | """ |
---|
[2349] | 2182 | if insitu is None: |
---|
| 2183 | insitu = rcParams['insitu'] |
---|
[876] | 2184 | self._math._setinsitu(insitu) |
---|
[513] | 2185 | varlist = vars() |
---|
[876] | 2186 | s = scantable(self._math._bin(self, width)) |
---|
[1118] | 2187 | s._add_history("bin", varlist) |
---|
[1589] | 2188 | if insitu: |
---|
| 2189 | self._assign(s) |
---|
| 2190 | else: |
---|
| 2191 | return s |
---|
[513] | 2192 | |
---|
[1862] | 2193 | @asaplog_post_dec |
---|
[2672] | 2194 | def reshape(self, first, last, insitu=None): |
---|
| 2195 | """Resize the band by providing first and last channel. |
---|
| 2196 | This will cut off all channels outside [first, last]. |
---|
| 2197 | """ |
---|
| 2198 | if insitu is None: |
---|
| 2199 | insitu = rcParams['insitu'] |
---|
| 2200 | varlist = vars() |
---|
| 2201 | if last < 0: |
---|
| 2202 | last = self.nchan()-1 + last |
---|
| 2203 | s = None |
---|
| 2204 | if insitu: |
---|
| 2205 | s = self |
---|
| 2206 | else: |
---|
| 2207 | s = self.copy() |
---|
| 2208 | s._reshape(first,last) |
---|
| 2209 | s._add_history("reshape", varlist) |
---|
| 2210 | if not insitu: |
---|
| 2211 | return s |
---|
| 2212 | |
---|
| 2213 | @asaplog_post_dec |
---|
[513] | 2214 | def resample(self, width=5, method='cubic', insitu=None): |
---|
[1846] | 2215 | """\ |
---|
[1348] | 2216 | Return a scan where all spectra have been binned up. |
---|
[1573] | 2217 | |
---|
[1348] | 2218 | Parameters: |
---|
[1846] | 2219 | |
---|
[513] | 2220 | width: The bin width (default=5) in pixels |
---|
[1855] | 2221 | |
---|
[513] | 2222 | method: Interpolation method when correcting from a table. |
---|
[2431] | 2223 | Values are 'nearest', 'linear', 'cubic' (default) |
---|
| 2224 | and 'spline' |
---|
[1855] | 2225 | |
---|
[513] | 2226 | insitu: if False a new scantable is returned. |
---|
| 2227 | Otherwise, the scaling is done in-situ |
---|
| 2228 | The default is taken from .asaprc (False) |
---|
[1846] | 2229 | |
---|
[513] | 2230 | """ |
---|
[2349] | 2231 | if insitu is None: |
---|
| 2232 | insitu = rcParams['insitu'] |
---|
[876] | 2233 | self._math._setinsitu(insitu) |
---|
[513] | 2234 | varlist = vars() |
---|
[876] | 2235 | s = scantable(self._math._resample(self, method, width)) |
---|
[1118] | 2236 | s._add_history("resample", varlist) |
---|
[2349] | 2237 | if insitu: |
---|
| 2238 | self._assign(s) |
---|
| 2239 | else: |
---|
| 2240 | return s |
---|
[513] | 2241 | |
---|
[1862] | 2242 | @asaplog_post_dec |
---|
[946] | 2243 | def average_pol(self, mask=None, weight='none'): |
---|
[1846] | 2244 | """\ |
---|
[946] | 2245 | Average the Polarisations together. |
---|
[1846] | 2246 | |
---|
[946] | 2247 | Parameters: |
---|
[1846] | 2248 | |
---|
[946] | 2249 | mask: An optional mask defining the region, where the |
---|
| 2250 | averaging will be applied. The output will have all |
---|
| 2251 | specified points masked. |
---|
[1855] | 2252 | |
---|
[946] | 2253 | weight: Weighting scheme. 'none' (default), 'var' (1/var(spec) |
---|
| 2254 | weighted), or 'tsys' (1/Tsys**2 weighted) |
---|
[1846] | 2255 | |
---|
[946] | 2256 | """ |
---|
| 2257 | varlist = vars() |
---|
[1593] | 2258 | mask = mask or () |
---|
[1010] | 2259 | s = scantable(self._math._averagepol(self, mask, weight.upper())) |
---|
[1118] | 2260 | s._add_history("average_pol", varlist) |
---|
[992] | 2261 | return s |
---|
[513] | 2262 | |
---|
[1862] | 2263 | @asaplog_post_dec |
---|
[1145] | 2264 | def average_beam(self, mask=None, weight='none'): |
---|
[1846] | 2265 | """\ |
---|
[1145] | 2266 | Average the Beams together. |
---|
[1846] | 2267 | |
---|
[1145] | 2268 | Parameters: |
---|
| 2269 | mask: An optional mask defining the region, where the |
---|
| 2270 | averaging will be applied. The output will have all |
---|
| 2271 | specified points masked. |
---|
[1855] | 2272 | |
---|
[1145] | 2273 | weight: Weighting scheme. 'none' (default), 'var' (1/var(spec) |
---|
| 2274 | weighted), or 'tsys' (1/Tsys**2 weighted) |
---|
[1846] | 2275 | |
---|
[1145] | 2276 | """ |
---|
| 2277 | varlist = vars() |
---|
[1593] | 2278 | mask = mask or () |
---|
[1145] | 2279 | s = scantable(self._math._averagebeams(self, mask, weight.upper())) |
---|
| 2280 | s._add_history("average_beam", varlist) |
---|
| 2281 | return s |
---|
| 2282 | |
---|
[1586] | 2283 | def parallactify(self, pflag): |
---|
[1846] | 2284 | """\ |
---|
[1843] | 2285 | Set a flag to indicate whether this data should be treated as having |
---|
[1617] | 2286 | been 'parallactified' (total phase == 0.0) |
---|
[1846] | 2287 | |
---|
[1617] | 2288 | Parameters: |
---|
[1855] | 2289 | |
---|
[1843] | 2290 | pflag: Bool indicating whether to turn this on (True) or |
---|
[1617] | 2291 | off (False) |
---|
[1846] | 2292 | |
---|
[1617] | 2293 | """ |
---|
[1586] | 2294 | varlist = vars() |
---|
| 2295 | self._parallactify(pflag) |
---|
| 2296 | self._add_history("parallactify", varlist) |
---|
| 2297 | |
---|
[1862] | 2298 | @asaplog_post_dec |
---|
[992] | 2299 | def convert_pol(self, poltype=None): |
---|
[1846] | 2300 | """\ |
---|
[992] | 2301 | Convert the data to a different polarisation type. |
---|
[1565] | 2302 | Note that you will need cross-polarisation terms for most conversions. |
---|
[1846] | 2303 | |
---|
[992] | 2304 | Parameters: |
---|
[1855] | 2305 | |
---|
[992] | 2306 | poltype: The new polarisation type. Valid types are: |
---|
[2431] | 2307 | 'linear', 'circular', 'stokes' and 'linpol' |
---|
[1846] | 2308 | |
---|
[992] | 2309 | """ |
---|
| 2310 | varlist = vars() |
---|
[1859] | 2311 | s = scantable(self._math._convertpol(self, poltype)) |
---|
[1118] | 2312 | s._add_history("convert_pol", varlist) |
---|
[992] | 2313 | return s |
---|
| 2314 | |
---|
[1862] | 2315 | @asaplog_post_dec |
---|
[2269] | 2316 | def smooth(self, kernel="hanning", width=5.0, order=2, plot=False, |
---|
| 2317 | insitu=None): |
---|
[1846] | 2318 | """\ |
---|
[513] | 2319 | Smooth the spectrum by the specified kernel (conserving flux). |
---|
[1846] | 2320 | |
---|
[513] | 2321 | Parameters: |
---|
[1846] | 2322 | |
---|
[513] | 2323 | kernel: The type of smoothing kernel. Select from |
---|
[1574] | 2324 | 'hanning' (default), 'gaussian', 'boxcar', 'rmedian' |
---|
| 2325 | or 'poly' |
---|
[1855] | 2326 | |
---|
[513] | 2327 | width: The width of the kernel in pixels. For hanning this is |
---|
| 2328 | ignored otherwise it defauls to 5 pixels. |
---|
| 2329 | For 'gaussian' it is the Full Width Half |
---|
| 2330 | Maximum. For 'boxcar' it is the full width. |
---|
[1574] | 2331 | For 'rmedian' and 'poly' it is the half width. |
---|
[1855] | 2332 | |
---|
[1574] | 2333 | order: Optional parameter for 'poly' kernel (default is 2), to |
---|
| 2334 | specify the order of the polnomial. Ignored by all other |
---|
| 2335 | kernels. |
---|
[1855] | 2336 | |
---|
[1819] | 2337 | plot: plot the original and the smoothed spectra. |
---|
| 2338 | In this each indivual fit has to be approved, by |
---|
| 2339 | typing 'y' or 'n' |
---|
[1855] | 2340 | |
---|
[513] | 2341 | insitu: if False a new scantable is returned. |
---|
| 2342 | Otherwise, the scaling is done in-situ |
---|
| 2343 | The default is taken from .asaprc (False) |
---|
[1846] | 2344 | |
---|
[513] | 2345 | """ |
---|
| 2346 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 2347 | self._math._setinsitu(insitu) |
---|
[513] | 2348 | varlist = vars() |
---|
[1819] | 2349 | |
---|
| 2350 | if plot: orgscan = self.copy() |
---|
| 2351 | |
---|
[1574] | 2352 | s = scantable(self._math._smooth(self, kernel.lower(), width, order)) |
---|
[876] | 2353 | s._add_history("smooth", varlist) |
---|
[1819] | 2354 | |
---|
[2610] | 2355 | action = 'H' |
---|
[1819] | 2356 | if plot: |
---|
[2150] | 2357 | from asap.asapplotter import new_asaplot |
---|
| 2358 | theplot = new_asaplot(rcParams['plotter.gui']) |
---|
[2535] | 2359 | from matplotlib import rc as rcp |
---|
| 2360 | rcp('lines', linewidth=1) |
---|
[2150] | 2361 | theplot.set_panels() |
---|
[1819] | 2362 | ylab=s._get_ordinate_label() |
---|
[2150] | 2363 | #theplot.palette(0,["#777777","red"]) |
---|
[1819] | 2364 | for r in xrange(s.nrow()): |
---|
| 2365 | xsm=s._getabcissa(r) |
---|
| 2366 | ysm=s._getspectrum(r) |
---|
| 2367 | xorg=orgscan._getabcissa(r) |
---|
| 2368 | yorg=orgscan._getspectrum(r) |
---|
[2610] | 2369 | if action != "N": #skip plotting if rejecting all |
---|
| 2370 | theplot.clear() |
---|
| 2371 | theplot.hold() |
---|
| 2372 | theplot.set_axes('ylabel',ylab) |
---|
| 2373 | theplot.set_axes('xlabel',s._getabcissalabel(r)) |
---|
| 2374 | theplot.set_axes('title',s._getsourcename(r)) |
---|
| 2375 | theplot.set_line(label='Original',color="#777777") |
---|
| 2376 | theplot.plot(xorg,yorg) |
---|
| 2377 | theplot.set_line(label='Smoothed',color="red") |
---|
| 2378 | theplot.plot(xsm,ysm) |
---|
| 2379 | ### Ugly part for legend |
---|
| 2380 | for i in [0,1]: |
---|
| 2381 | theplot.subplots[0]['lines'].append( |
---|
| 2382 | [theplot.subplots[0]['axes'].lines[i]] |
---|
| 2383 | ) |
---|
| 2384 | theplot.release() |
---|
| 2385 | ### Ugly part for legend |
---|
| 2386 | theplot.subplots[0]['lines']=[] |
---|
| 2387 | res = self._get_verify_action("Accept smoothing?",action) |
---|
| 2388 | #print "IF%d, POL%d: got result = %s" %(s.getif(r),s.getpol(r),res) |
---|
| 2389 | if r == 0: action = None |
---|
| 2390 | #res = raw_input("Accept smoothing ([y]/n): ") |
---|
[1819] | 2391 | if res.upper() == 'N': |
---|
[2610] | 2392 | # reject for the current rows |
---|
[1819] | 2393 | s._setspectrum(yorg, r) |
---|
[2610] | 2394 | elif res.upper() == 'R': |
---|
| 2395 | # reject all the following rows |
---|
| 2396 | action = "N" |
---|
| 2397 | s._setspectrum(yorg, r) |
---|
| 2398 | elif res.upper() == 'A': |
---|
| 2399 | # accept all the following rows |
---|
| 2400 | break |
---|
[2150] | 2401 | theplot.quit() |
---|
| 2402 | del theplot |
---|
[1819] | 2403 | del orgscan |
---|
| 2404 | |
---|
[876] | 2405 | if insitu: self._assign(s) |
---|
| 2406 | else: return s |
---|
[513] | 2407 | |
---|
[2186] | 2408 | @asaplog_post_dec |
---|
[2435] | 2409 | def regrid_channel(self, width=5, plot=False, insitu=None): |
---|
| 2410 | """\ |
---|
| 2411 | Regrid the spectra by the specified channel width |
---|
| 2412 | |
---|
| 2413 | Parameters: |
---|
| 2414 | |
---|
| 2415 | width: The channel width (float) of regridded spectra |
---|
| 2416 | in the current spectral unit. |
---|
| 2417 | |
---|
| 2418 | plot: [NOT IMPLEMENTED YET] |
---|
| 2419 | plot the original and the regridded spectra. |
---|
| 2420 | In this each indivual fit has to be approved, by |
---|
| 2421 | typing 'y' or 'n' |
---|
| 2422 | |
---|
| 2423 | insitu: if False a new scantable is returned. |
---|
| 2424 | Otherwise, the scaling is done in-situ |
---|
| 2425 | The default is taken from .asaprc (False) |
---|
| 2426 | |
---|
| 2427 | """ |
---|
| 2428 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 2429 | varlist = vars() |
---|
| 2430 | |
---|
| 2431 | if plot: |
---|
| 2432 | asaplog.post() |
---|
| 2433 | asaplog.push("Verification plot is not implemtnetd yet.") |
---|
| 2434 | asaplog.post("WARN") |
---|
| 2435 | |
---|
| 2436 | s = self.copy() |
---|
| 2437 | s._regrid_specchan(width) |
---|
| 2438 | |
---|
| 2439 | s._add_history("regrid_channel", varlist) |
---|
| 2440 | |
---|
| 2441 | # if plot: |
---|
| 2442 | # from asap.asapplotter import new_asaplot |
---|
| 2443 | # theplot = new_asaplot(rcParams['plotter.gui']) |
---|
[2535] | 2444 | # from matplotlib import rc as rcp |
---|
| 2445 | # rcp('lines', linewidth=1) |
---|
[2435] | 2446 | # theplot.set_panels() |
---|
| 2447 | # ylab=s._get_ordinate_label() |
---|
| 2448 | # #theplot.palette(0,["#777777","red"]) |
---|
| 2449 | # for r in xrange(s.nrow()): |
---|
| 2450 | # xsm=s._getabcissa(r) |
---|
| 2451 | # ysm=s._getspectrum(r) |
---|
| 2452 | # xorg=orgscan._getabcissa(r) |
---|
| 2453 | # yorg=orgscan._getspectrum(r) |
---|
| 2454 | # theplot.clear() |
---|
| 2455 | # theplot.hold() |
---|
| 2456 | # theplot.set_axes('ylabel',ylab) |
---|
| 2457 | # theplot.set_axes('xlabel',s._getabcissalabel(r)) |
---|
| 2458 | # theplot.set_axes('title',s._getsourcename(r)) |
---|
| 2459 | # theplot.set_line(label='Original',color="#777777") |
---|
| 2460 | # theplot.plot(xorg,yorg) |
---|
| 2461 | # theplot.set_line(label='Smoothed',color="red") |
---|
| 2462 | # theplot.plot(xsm,ysm) |
---|
| 2463 | # ### Ugly part for legend |
---|
| 2464 | # for i in [0,1]: |
---|
| 2465 | # theplot.subplots[0]['lines'].append( |
---|
| 2466 | # [theplot.subplots[0]['axes'].lines[i]] |
---|
| 2467 | # ) |
---|
| 2468 | # theplot.release() |
---|
| 2469 | # ### Ugly part for legend |
---|
| 2470 | # theplot.subplots[0]['lines']=[] |
---|
| 2471 | # res = raw_input("Accept smoothing ([y]/n): ") |
---|
| 2472 | # if res.upper() == 'N': |
---|
| 2473 | # s._setspectrum(yorg, r) |
---|
| 2474 | # theplot.quit() |
---|
| 2475 | # del theplot |
---|
| 2476 | # del orgscan |
---|
| 2477 | |
---|
| 2478 | if insitu: self._assign(s) |
---|
| 2479 | else: return s |
---|
| 2480 | |
---|
| 2481 | @asaplog_post_dec |
---|
[2186] | 2482 | def _parse_wn(self, wn): |
---|
| 2483 | if isinstance(wn, list) or isinstance(wn, tuple): |
---|
| 2484 | return wn |
---|
| 2485 | elif isinstance(wn, int): |
---|
| 2486 | return [ wn ] |
---|
| 2487 | elif isinstance(wn, str): |
---|
[2277] | 2488 | if '-' in wn: # case 'a-b' : return [a,a+1,...,b-1,b] |
---|
[2186] | 2489 | val = wn.split('-') |
---|
| 2490 | val = [int(val[0]), int(val[1])] |
---|
| 2491 | val.sort() |
---|
| 2492 | res = [i for i in xrange(val[0], val[1]+1)] |
---|
[2277] | 2493 | elif wn[:2] == '<=' or wn[:2] == '=<': # cases '<=a','=<a' : return [0,1,...,a-1,a] |
---|
[2186] | 2494 | val = int(wn[2:])+1 |
---|
| 2495 | res = [i for i in xrange(val)] |
---|
[2277] | 2496 | elif wn[-2:] == '>=' or wn[-2:] == '=>': # cases 'a>=','a=>' : return [0,1,...,a-1,a] |
---|
[2186] | 2497 | val = int(wn[:-2])+1 |
---|
| 2498 | res = [i for i in xrange(val)] |
---|
[2277] | 2499 | elif wn[0] == '<': # case '<a' : return [0,1,...,a-2,a-1] |
---|
[2186] | 2500 | val = int(wn[1:]) |
---|
| 2501 | res = [i for i in xrange(val)] |
---|
[2277] | 2502 | elif wn[-1] == '>': # case 'a>' : return [0,1,...,a-2,a-1] |
---|
[2186] | 2503 | val = int(wn[:-1]) |
---|
| 2504 | res = [i for i in xrange(val)] |
---|
[2411] | 2505 | elif wn[:2] == '>=' or wn[:2] == '=>': # cases '>=a','=>a' : return [a,-999], which is |
---|
| 2506 | # then interpreted in C++ |
---|
| 2507 | # side as [a,a+1,...,a_nyq] |
---|
| 2508 | # (CAS-3759) |
---|
[2186] | 2509 | val = int(wn[2:]) |
---|
[2411] | 2510 | res = [val, -999] |
---|
| 2511 | #res = [i for i in xrange(val, self.nchan()/2+1)] |
---|
| 2512 | elif wn[-2:] == '<=' or wn[-2:] == '=<': # cases 'a<=','a=<' : return [a,-999], which is |
---|
| 2513 | # then interpreted in C++ |
---|
| 2514 | # side as [a,a+1,...,a_nyq] |
---|
| 2515 | # (CAS-3759) |
---|
[2186] | 2516 | val = int(wn[:-2]) |
---|
[2411] | 2517 | res = [val, -999] |
---|
| 2518 | #res = [i for i in xrange(val, self.nchan()/2+1)] |
---|
| 2519 | elif wn[0] == '>': # case '>a' : return [a+1,-999], which is |
---|
| 2520 | # then interpreted in C++ |
---|
| 2521 | # side as [a+1,a+2,...,a_nyq] |
---|
| 2522 | # (CAS-3759) |
---|
[2186] | 2523 | val = int(wn[1:])+1 |
---|
[2411] | 2524 | res = [val, -999] |
---|
| 2525 | #res = [i for i in xrange(val, self.nchan()/2+1)] |
---|
| 2526 | elif wn[-1] == '<': # case 'a<' : return [a+1,-999], which is |
---|
| 2527 | # then interpreted in C++ |
---|
| 2528 | # side as [a+1,a+2,...,a_nyq] |
---|
| 2529 | # (CAS-3759) |
---|
[2186] | 2530 | val = int(wn[:-1])+1 |
---|
[2411] | 2531 | res = [val, -999] |
---|
| 2532 | #res = [i for i in xrange(val, self.nchan()/2+1)] |
---|
[2012] | 2533 | |
---|
[2186] | 2534 | return res |
---|
| 2535 | else: |
---|
| 2536 | msg = 'wrong value given for addwn/rejwn' |
---|
| 2537 | raise RuntimeError(msg) |
---|
| 2538 | |
---|
| 2539 | |
---|
[1862] | 2540 | @asaplog_post_dec |
---|
[2277] | 2541 | def sinusoid_baseline(self, insitu=None, mask=None, applyfft=None, |
---|
[2269] | 2542 | fftmethod=None, fftthresh=None, |
---|
| 2543 | addwn=None, rejwn=None, clipthresh=None, |
---|
| 2544 | clipniter=None, plot=None, |
---|
| 2545 | getresidual=None, showprogress=None, |
---|
[2641] | 2546 | minnrow=None, outlog=None, blfile=None, csvformat=None): |
---|
[2047] | 2547 | """\ |
---|
[2349] | 2548 | Return a scan which has been baselined (all rows) with sinusoidal |
---|
| 2549 | functions. |
---|
| 2550 | |
---|
[2047] | 2551 | Parameters: |
---|
[2186] | 2552 | insitu: if False a new scantable is returned. |
---|
[2081] | 2553 | Otherwise, the scaling is done in-situ |
---|
| 2554 | The default is taken from .asaprc (False) |
---|
[2186] | 2555 | mask: an optional mask |
---|
| 2556 | applyfft: if True use some method, such as FFT, to find |
---|
| 2557 | strongest sinusoidal components in the wavenumber |
---|
| 2558 | domain to be used for baseline fitting. |
---|
| 2559 | default is True. |
---|
| 2560 | fftmethod: method to find the strong sinusoidal components. |
---|
| 2561 | now only 'fft' is available and it is the default. |
---|
| 2562 | fftthresh: the threshold to select wave numbers to be used for |
---|
| 2563 | fitting from the distribution of amplitudes in the |
---|
| 2564 | wavenumber domain. |
---|
| 2565 | both float and string values accepted. |
---|
| 2566 | given a float value, the unit is set to sigma. |
---|
| 2567 | for string values, allowed formats include: |
---|
[2349] | 2568 | 'xsigma' or 'x' (= x-sigma level. e.g., |
---|
| 2569 | '3sigma'), or |
---|
[2186] | 2570 | 'topx' (= the x strongest ones, e.g. 'top5'). |
---|
| 2571 | default is 3.0 (unit: sigma). |
---|
| 2572 | addwn: the additional wave numbers to be used for fitting. |
---|
| 2573 | list or integer value is accepted to specify every |
---|
| 2574 | wave numbers. also string value can be used in case |
---|
| 2575 | you need to specify wave numbers in a certain range, |
---|
| 2576 | e.g., 'a-b' (= a, a+1, a+2, ..., b-1, b), |
---|
| 2577 | '<a' (= 0,1,...,a-2,a-1), |
---|
| 2578 | '>=a' (= a, a+1, ... up to the maximum wave |
---|
| 2579 | number corresponding to the Nyquist |
---|
| 2580 | frequency for the case of FFT). |
---|
[2411] | 2581 | default is [0]. |
---|
[2186] | 2582 | rejwn: the wave numbers NOT to be used for fitting. |
---|
| 2583 | can be set just as addwn but has higher priority: |
---|
| 2584 | wave numbers which are specified both in addwn |
---|
| 2585 | and rejwn will NOT be used. default is []. |
---|
[2081] | 2586 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
[2349] | 2587 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 2588 | clipping (default is 0) |
---|
[2081] | 2589 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 2590 | plot the fit and the residual. In this each |
---|
| 2591 | indivual fit has to be approved, by typing 'y' |
---|
| 2592 | or 'n' |
---|
| 2593 | getresidual: if False, returns best-fit values instead of |
---|
| 2594 | residual. (default is True) |
---|
[2189] | 2595 | showprogress: show progress status for large data. |
---|
| 2596 | default is True. |
---|
| 2597 | minnrow: minimum number of input spectra to show. |
---|
| 2598 | default is 1000. |
---|
[2081] | 2599 | outlog: Output the coefficients of the best-fit |
---|
| 2600 | function to logger (default is False) |
---|
| 2601 | blfile: Name of a text file in which the best-fit |
---|
| 2602 | parameter values to be written |
---|
[2186] | 2603 | (default is '': no file/logger output) |
---|
[2641] | 2604 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[2047] | 2605 | |
---|
| 2606 | Example: |
---|
[2349] | 2607 | # return a scan baselined by a combination of sinusoidal curves |
---|
| 2608 | # having wave numbers in spectral window up to 10, |
---|
[2047] | 2609 | # also with 3-sigma clipping, iteration up to 4 times |
---|
[2186] | 2610 | bscan = scan.sinusoid_baseline(addwn='<=10',clipthresh=3.0,clipniter=4) |
---|
[2081] | 2611 | |
---|
| 2612 | Note: |
---|
| 2613 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 2614 | based on specunit of 'channel'. |
---|
[2047] | 2615 | """ |
---|
| 2616 | |
---|
[2186] | 2617 | try: |
---|
| 2618 | varlist = vars() |
---|
[2047] | 2619 | |
---|
[2186] | 2620 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 2621 | if insitu: |
---|
| 2622 | workscan = self |
---|
| 2623 | else: |
---|
| 2624 | workscan = self.copy() |
---|
| 2625 | |
---|
[2410] | 2626 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 2627 | if mask is None: mask = [] |
---|
[2186] | 2628 | if applyfft is None: applyfft = True |
---|
| 2629 | if fftmethod is None: fftmethod = 'fft' |
---|
| 2630 | if fftthresh is None: fftthresh = 3.0 |
---|
[2411] | 2631 | if addwn is None: addwn = [0] |
---|
[2186] | 2632 | if rejwn is None: rejwn = [] |
---|
| 2633 | if clipthresh is None: clipthresh = 3.0 |
---|
| 2634 | if clipniter is None: clipniter = 0 |
---|
| 2635 | if plot is None: plot = False |
---|
| 2636 | if getresidual is None: getresidual = True |
---|
[2189] | 2637 | if showprogress is None: showprogress = True |
---|
| 2638 | if minnrow is None: minnrow = 1000 |
---|
[2186] | 2639 | if outlog is None: outlog = False |
---|
| 2640 | if blfile is None: blfile = '' |
---|
[2641] | 2641 | if csvformat is None: csvformat = False |
---|
[2047] | 2642 | |
---|
[2641] | 2643 | if csvformat: |
---|
| 2644 | scsvformat = "T" |
---|
| 2645 | else: |
---|
| 2646 | scsvformat = "F" |
---|
| 2647 | |
---|
[2081] | 2648 | #CURRENTLY, PLOT=true is UNAVAILABLE UNTIL sinusoidal fitting is implemented as a fitter method. |
---|
[2349] | 2649 | workscan._sinusoid_baseline(mask, applyfft, fftmethod.lower(), |
---|
| 2650 | str(fftthresh).lower(), |
---|
| 2651 | workscan._parse_wn(addwn), |
---|
[2643] | 2652 | workscan._parse_wn(rejwn), |
---|
| 2653 | clipthresh, clipniter, |
---|
| 2654 | getresidual, |
---|
[2349] | 2655 | pack_progress_params(showprogress, |
---|
[2641] | 2656 | minnrow), |
---|
| 2657 | outlog, scsvformat+blfile) |
---|
[2186] | 2658 | workscan._add_history('sinusoid_baseline', varlist) |
---|
[2047] | 2659 | |
---|
| 2660 | if insitu: |
---|
| 2661 | self._assign(workscan) |
---|
| 2662 | else: |
---|
| 2663 | return workscan |
---|
| 2664 | |
---|
| 2665 | except RuntimeError, e: |
---|
[2186] | 2666 | raise_fitting_failure_exception(e) |
---|
[2047] | 2667 | |
---|
| 2668 | |
---|
[2186] | 2669 | @asaplog_post_dec |
---|
[2349] | 2670 | def auto_sinusoid_baseline(self, insitu=None, mask=None, applyfft=None, |
---|
| 2671 | fftmethod=None, fftthresh=None, |
---|
| 2672 | addwn=None, rejwn=None, clipthresh=None, |
---|
| 2673 | clipniter=None, edge=None, threshold=None, |
---|
| 2674 | chan_avg_limit=None, plot=None, |
---|
| 2675 | getresidual=None, showprogress=None, |
---|
[2641] | 2676 | minnrow=None, outlog=None, blfile=None, csvformat=None): |
---|
[2047] | 2677 | """\ |
---|
[2349] | 2678 | Return a scan which has been baselined (all rows) with sinusoidal |
---|
| 2679 | functions. |
---|
[2047] | 2680 | Spectral lines are detected first using linefinder and masked out |
---|
| 2681 | to avoid them affecting the baseline solution. |
---|
| 2682 | |
---|
| 2683 | Parameters: |
---|
[2189] | 2684 | insitu: if False a new scantable is returned. |
---|
| 2685 | Otherwise, the scaling is done in-situ |
---|
| 2686 | The default is taken from .asaprc (False) |
---|
| 2687 | mask: an optional mask retreived from scantable |
---|
| 2688 | applyfft: if True use some method, such as FFT, to find |
---|
| 2689 | strongest sinusoidal components in the wavenumber |
---|
| 2690 | domain to be used for baseline fitting. |
---|
| 2691 | default is True. |
---|
| 2692 | fftmethod: method to find the strong sinusoidal components. |
---|
| 2693 | now only 'fft' is available and it is the default. |
---|
| 2694 | fftthresh: the threshold to select wave numbers to be used for |
---|
| 2695 | fitting from the distribution of amplitudes in the |
---|
| 2696 | wavenumber domain. |
---|
| 2697 | both float and string values accepted. |
---|
| 2698 | given a float value, the unit is set to sigma. |
---|
| 2699 | for string values, allowed formats include: |
---|
[2349] | 2700 | 'xsigma' or 'x' (= x-sigma level. e.g., |
---|
| 2701 | '3sigma'), or |
---|
[2189] | 2702 | 'topx' (= the x strongest ones, e.g. 'top5'). |
---|
| 2703 | default is 3.0 (unit: sigma). |
---|
| 2704 | addwn: the additional wave numbers to be used for fitting. |
---|
| 2705 | list or integer value is accepted to specify every |
---|
| 2706 | wave numbers. also string value can be used in case |
---|
| 2707 | you need to specify wave numbers in a certain range, |
---|
| 2708 | e.g., 'a-b' (= a, a+1, a+2, ..., b-1, b), |
---|
| 2709 | '<a' (= 0,1,...,a-2,a-1), |
---|
| 2710 | '>=a' (= a, a+1, ... up to the maximum wave |
---|
| 2711 | number corresponding to the Nyquist |
---|
| 2712 | frequency for the case of FFT). |
---|
[2411] | 2713 | default is [0]. |
---|
[2189] | 2714 | rejwn: the wave numbers NOT to be used for fitting. |
---|
| 2715 | can be set just as addwn but has higher priority: |
---|
| 2716 | wave numbers which are specified both in addwn |
---|
| 2717 | and rejwn will NOT be used. default is []. |
---|
| 2718 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
[2349] | 2719 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 2720 | clipping (default is 0) |
---|
[2189] | 2721 | edge: an optional number of channel to drop at |
---|
| 2722 | the edge of spectrum. If only one value is |
---|
| 2723 | specified, the same number will be dropped |
---|
| 2724 | from both sides of the spectrum. Default |
---|
| 2725 | is to keep all channels. Nested tuples |
---|
| 2726 | represent individual edge selection for |
---|
| 2727 | different IFs (a number of spectral channels |
---|
| 2728 | can be different) |
---|
| 2729 | threshold: the threshold used by line finder. It is |
---|
| 2730 | better to keep it large as only strong lines |
---|
| 2731 | affect the baseline solution. |
---|
| 2732 | chan_avg_limit: a maximum number of consequtive spectral |
---|
| 2733 | channels to average during the search of |
---|
| 2734 | weak and broad lines. The default is no |
---|
| 2735 | averaging (and no search for weak lines). |
---|
| 2736 | If such lines can affect the fitted baseline |
---|
| 2737 | (e.g. a high order polynomial is fitted), |
---|
| 2738 | increase this parameter (usually values up |
---|
| 2739 | to 8 are reasonable). Most users of this |
---|
| 2740 | method should find the default value sufficient. |
---|
| 2741 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 2742 | plot the fit and the residual. In this each |
---|
| 2743 | indivual fit has to be approved, by typing 'y' |
---|
| 2744 | or 'n' |
---|
| 2745 | getresidual: if False, returns best-fit values instead of |
---|
| 2746 | residual. (default is True) |
---|
| 2747 | showprogress: show progress status for large data. |
---|
| 2748 | default is True. |
---|
| 2749 | minnrow: minimum number of input spectra to show. |
---|
| 2750 | default is 1000. |
---|
| 2751 | outlog: Output the coefficients of the best-fit |
---|
| 2752 | function to logger (default is False) |
---|
| 2753 | blfile: Name of a text file in which the best-fit |
---|
| 2754 | parameter values to be written |
---|
| 2755 | (default is "": no file/logger output) |
---|
[2641] | 2756 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[2047] | 2757 | |
---|
| 2758 | Example: |
---|
[2186] | 2759 | bscan = scan.auto_sinusoid_baseline(addwn='<=10', insitu=False) |
---|
[2081] | 2760 | |
---|
| 2761 | Note: |
---|
| 2762 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 2763 | based on specunit of 'channel'. |
---|
[2047] | 2764 | """ |
---|
| 2765 | |
---|
[2186] | 2766 | try: |
---|
| 2767 | varlist = vars() |
---|
[2047] | 2768 | |
---|
[2186] | 2769 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 2770 | if insitu: |
---|
| 2771 | workscan = self |
---|
[2047] | 2772 | else: |
---|
[2186] | 2773 | workscan = self.copy() |
---|
| 2774 | |
---|
[2410] | 2775 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 2776 | if mask is None: mask = [] |
---|
[2186] | 2777 | if applyfft is None: applyfft = True |
---|
| 2778 | if fftmethod is None: fftmethod = 'fft' |
---|
| 2779 | if fftthresh is None: fftthresh = 3.0 |
---|
[2411] | 2780 | if addwn is None: addwn = [0] |
---|
[2186] | 2781 | if rejwn is None: rejwn = [] |
---|
| 2782 | if clipthresh is None: clipthresh = 3.0 |
---|
| 2783 | if clipniter is None: clipniter = 0 |
---|
| 2784 | if edge is None: edge = (0,0) |
---|
| 2785 | if threshold is None: threshold = 3 |
---|
| 2786 | if chan_avg_limit is None: chan_avg_limit = 1 |
---|
| 2787 | if plot is None: plot = False |
---|
| 2788 | if getresidual is None: getresidual = True |
---|
[2189] | 2789 | if showprogress is None: showprogress = True |
---|
| 2790 | if minnrow is None: minnrow = 1000 |
---|
[2186] | 2791 | if outlog is None: outlog = False |
---|
| 2792 | if blfile is None: blfile = '' |
---|
[2641] | 2793 | if csvformat is None: csvformat = False |
---|
[2047] | 2794 | |
---|
[2641] | 2795 | if csvformat: |
---|
| 2796 | scsvformat = "T" |
---|
| 2797 | else: |
---|
| 2798 | scsvformat = "F" |
---|
| 2799 | |
---|
[2277] | 2800 | #CURRENTLY, PLOT=true is UNAVAILABLE UNTIL sinusoidal fitting is implemented as a fitter method. |
---|
[2349] | 2801 | workscan._auto_sinusoid_baseline(mask, applyfft, |
---|
| 2802 | fftmethod.lower(), |
---|
| 2803 | str(fftthresh).lower(), |
---|
| 2804 | workscan._parse_wn(addwn), |
---|
| 2805 | workscan._parse_wn(rejwn), |
---|
| 2806 | clipthresh, clipniter, |
---|
| 2807 | normalise_edge_param(edge), |
---|
| 2808 | threshold, chan_avg_limit, |
---|
| 2809 | getresidual, |
---|
| 2810 | pack_progress_params(showprogress, |
---|
| 2811 | minnrow), |
---|
[2641] | 2812 | outlog, scsvformat+blfile) |
---|
[2047] | 2813 | workscan._add_history("auto_sinusoid_baseline", varlist) |
---|
| 2814 | |
---|
| 2815 | if insitu: |
---|
| 2816 | self._assign(workscan) |
---|
| 2817 | else: |
---|
| 2818 | return workscan |
---|
| 2819 | |
---|
| 2820 | except RuntimeError, e: |
---|
[2186] | 2821 | raise_fitting_failure_exception(e) |
---|
[2047] | 2822 | |
---|
| 2823 | @asaplog_post_dec |
---|
[2349] | 2824 | def cspline_baseline(self, insitu=None, mask=None, npiece=None, |
---|
| 2825 | clipthresh=None, clipniter=None, plot=None, |
---|
| 2826 | getresidual=None, showprogress=None, minnrow=None, |
---|
[2641] | 2827 | outlog=None, blfile=None, csvformat=None): |
---|
[1846] | 2828 | """\ |
---|
[2349] | 2829 | Return a scan which has been baselined (all rows) by cubic spline |
---|
| 2830 | function (piecewise cubic polynomial). |
---|
| 2831 | |
---|
[513] | 2832 | Parameters: |
---|
[2189] | 2833 | insitu: If False a new scantable is returned. |
---|
| 2834 | Otherwise, the scaling is done in-situ |
---|
| 2835 | The default is taken from .asaprc (False) |
---|
| 2836 | mask: An optional mask |
---|
| 2837 | npiece: Number of pieces. (default is 2) |
---|
| 2838 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
[2349] | 2839 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 2840 | clipping (default is 0) |
---|
[2189] | 2841 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 2842 | plot the fit and the residual. In this each |
---|
| 2843 | indivual fit has to be approved, by typing 'y' |
---|
| 2844 | or 'n' |
---|
| 2845 | getresidual: if False, returns best-fit values instead of |
---|
| 2846 | residual. (default is True) |
---|
| 2847 | showprogress: show progress status for large data. |
---|
| 2848 | default is True. |
---|
| 2849 | minnrow: minimum number of input spectra to show. |
---|
| 2850 | default is 1000. |
---|
| 2851 | outlog: Output the coefficients of the best-fit |
---|
| 2852 | function to logger (default is False) |
---|
| 2853 | blfile: Name of a text file in which the best-fit |
---|
| 2854 | parameter values to be written |
---|
| 2855 | (default is "": no file/logger output) |
---|
[2641] | 2856 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[1846] | 2857 | |
---|
[2012] | 2858 | Example: |
---|
[2349] | 2859 | # return a scan baselined by a cubic spline consisting of 2 pieces |
---|
| 2860 | # (i.e., 1 internal knot), |
---|
[2012] | 2861 | # also with 3-sigma clipping, iteration up to 4 times |
---|
| 2862 | bscan = scan.cspline_baseline(npiece=2,clipthresh=3.0,clipniter=4) |
---|
[2081] | 2863 | |
---|
| 2864 | Note: |
---|
| 2865 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 2866 | based on specunit of 'channel'. |
---|
[2012] | 2867 | """ |
---|
| 2868 | |
---|
[2186] | 2869 | try: |
---|
| 2870 | varlist = vars() |
---|
| 2871 | |
---|
| 2872 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 2873 | if insitu: |
---|
| 2874 | workscan = self |
---|
| 2875 | else: |
---|
| 2876 | workscan = self.copy() |
---|
[1855] | 2877 | |
---|
[2410] | 2878 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 2879 | if mask is None: mask = [] |
---|
[2189] | 2880 | if npiece is None: npiece = 2 |
---|
| 2881 | if clipthresh is None: clipthresh = 3.0 |
---|
| 2882 | if clipniter is None: clipniter = 0 |
---|
| 2883 | if plot is None: plot = False |
---|
| 2884 | if getresidual is None: getresidual = True |
---|
| 2885 | if showprogress is None: showprogress = True |
---|
| 2886 | if minnrow is None: minnrow = 1000 |
---|
| 2887 | if outlog is None: outlog = False |
---|
| 2888 | if blfile is None: blfile = '' |
---|
[2641] | 2889 | if csvformat is None: csvformat = False |
---|
[1855] | 2890 | |
---|
[2641] | 2891 | if csvformat: |
---|
| 2892 | scsvformat = "T" |
---|
| 2893 | else: |
---|
| 2894 | scsvformat = "F" |
---|
| 2895 | |
---|
[2012] | 2896 | #CURRENTLY, PLOT=true UNAVAILABLE UNTIL cubic spline fitting is implemented as a fitter method. |
---|
[2349] | 2897 | workscan._cspline_baseline(mask, npiece, clipthresh, clipniter, |
---|
| 2898 | getresidual, |
---|
| 2899 | pack_progress_params(showprogress, |
---|
[2641] | 2900 | minnrow), |
---|
| 2901 | outlog, scsvformat+blfile) |
---|
[2012] | 2902 | workscan._add_history("cspline_baseline", varlist) |
---|
| 2903 | |
---|
| 2904 | if insitu: |
---|
| 2905 | self._assign(workscan) |
---|
| 2906 | else: |
---|
| 2907 | return workscan |
---|
| 2908 | |
---|
| 2909 | except RuntimeError, e: |
---|
[2186] | 2910 | raise_fitting_failure_exception(e) |
---|
[1855] | 2911 | |
---|
[2186] | 2912 | @asaplog_post_dec |
---|
[2349] | 2913 | def auto_cspline_baseline(self, insitu=None, mask=None, npiece=None, |
---|
| 2914 | clipthresh=None, clipniter=None, |
---|
| 2915 | edge=None, threshold=None, chan_avg_limit=None, |
---|
| 2916 | getresidual=None, plot=None, |
---|
| 2917 | showprogress=None, minnrow=None, outlog=None, |
---|
[2641] | 2918 | blfile=None, csvformat=None): |
---|
[2012] | 2919 | """\ |
---|
| 2920 | Return a scan which has been baselined (all rows) by cubic spline |
---|
| 2921 | function (piecewise cubic polynomial). |
---|
| 2922 | Spectral lines are detected first using linefinder and masked out |
---|
| 2923 | to avoid them affecting the baseline solution. |
---|
| 2924 | |
---|
| 2925 | Parameters: |
---|
[2189] | 2926 | insitu: if False a new scantable is returned. |
---|
| 2927 | Otherwise, the scaling is done in-situ |
---|
| 2928 | The default is taken from .asaprc (False) |
---|
| 2929 | mask: an optional mask retreived from scantable |
---|
| 2930 | npiece: Number of pieces. (default is 2) |
---|
| 2931 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
[2349] | 2932 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 2933 | clipping (default is 0) |
---|
[2189] | 2934 | edge: an optional number of channel to drop at |
---|
| 2935 | the edge of spectrum. If only one value is |
---|
| 2936 | specified, the same number will be dropped |
---|
| 2937 | from both sides of the spectrum. Default |
---|
| 2938 | is to keep all channels. Nested tuples |
---|
| 2939 | represent individual edge selection for |
---|
| 2940 | different IFs (a number of spectral channels |
---|
| 2941 | can be different) |
---|
| 2942 | threshold: the threshold used by line finder. It is |
---|
| 2943 | better to keep it large as only strong lines |
---|
| 2944 | affect the baseline solution. |
---|
| 2945 | chan_avg_limit: a maximum number of consequtive spectral |
---|
| 2946 | channels to average during the search of |
---|
| 2947 | weak and broad lines. The default is no |
---|
| 2948 | averaging (and no search for weak lines). |
---|
| 2949 | If such lines can affect the fitted baseline |
---|
| 2950 | (e.g. a high order polynomial is fitted), |
---|
| 2951 | increase this parameter (usually values up |
---|
| 2952 | to 8 are reasonable). Most users of this |
---|
| 2953 | method should find the default value sufficient. |
---|
| 2954 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 2955 | plot the fit and the residual. In this each |
---|
| 2956 | indivual fit has to be approved, by typing 'y' |
---|
| 2957 | or 'n' |
---|
| 2958 | getresidual: if False, returns best-fit values instead of |
---|
| 2959 | residual. (default is True) |
---|
| 2960 | showprogress: show progress status for large data. |
---|
| 2961 | default is True. |
---|
| 2962 | minnrow: minimum number of input spectra to show. |
---|
| 2963 | default is 1000. |
---|
| 2964 | outlog: Output the coefficients of the best-fit |
---|
| 2965 | function to logger (default is False) |
---|
| 2966 | blfile: Name of a text file in which the best-fit |
---|
| 2967 | parameter values to be written |
---|
| 2968 | (default is "": no file/logger output) |
---|
[2641] | 2969 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[1846] | 2970 | |
---|
[1907] | 2971 | Example: |
---|
[2012] | 2972 | bscan = scan.auto_cspline_baseline(npiece=3, insitu=False) |
---|
[2081] | 2973 | |
---|
| 2974 | Note: |
---|
| 2975 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 2976 | based on specunit of 'channel'. |
---|
[2012] | 2977 | """ |
---|
[1846] | 2978 | |
---|
[2186] | 2979 | try: |
---|
| 2980 | varlist = vars() |
---|
[2012] | 2981 | |
---|
[2186] | 2982 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 2983 | if insitu: |
---|
| 2984 | workscan = self |
---|
[1391] | 2985 | else: |
---|
[2186] | 2986 | workscan = self.copy() |
---|
| 2987 | |
---|
[2410] | 2988 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 2989 | if mask is None: mask = [] |
---|
[2186] | 2990 | if npiece is None: npiece = 2 |
---|
| 2991 | if clipthresh is None: clipthresh = 3.0 |
---|
| 2992 | if clipniter is None: clipniter = 0 |
---|
| 2993 | if edge is None: edge = (0, 0) |
---|
| 2994 | if threshold is None: threshold = 3 |
---|
| 2995 | if chan_avg_limit is None: chan_avg_limit = 1 |
---|
| 2996 | if plot is None: plot = False |
---|
| 2997 | if getresidual is None: getresidual = True |
---|
[2189] | 2998 | if showprogress is None: showprogress = True |
---|
| 2999 | if minnrow is None: minnrow = 1000 |
---|
[2186] | 3000 | if outlog is None: outlog = False |
---|
| 3001 | if blfile is None: blfile = '' |
---|
[2641] | 3002 | if csvformat is None: csvformat = False |
---|
[1819] | 3003 | |
---|
[2641] | 3004 | if csvformat: |
---|
| 3005 | scsvformat = "T" |
---|
| 3006 | else: |
---|
| 3007 | scsvformat = "F" |
---|
| 3008 | |
---|
[2277] | 3009 | #CURRENTLY, PLOT=true UNAVAILABLE UNTIL cubic spline fitting is implemented as a fitter method. |
---|
[2269] | 3010 | workscan._auto_cspline_baseline(mask, npiece, clipthresh, |
---|
| 3011 | clipniter, |
---|
| 3012 | normalise_edge_param(edge), |
---|
| 3013 | threshold, |
---|
| 3014 | chan_avg_limit, getresidual, |
---|
| 3015 | pack_progress_params(showprogress, |
---|
| 3016 | minnrow), |
---|
[2641] | 3017 | outlog, scsvformat+blfile) |
---|
[2012] | 3018 | workscan._add_history("auto_cspline_baseline", varlist) |
---|
[1907] | 3019 | |
---|
[1856] | 3020 | if insitu: |
---|
| 3021 | self._assign(workscan) |
---|
| 3022 | else: |
---|
| 3023 | return workscan |
---|
[2012] | 3024 | |
---|
| 3025 | except RuntimeError, e: |
---|
[2186] | 3026 | raise_fitting_failure_exception(e) |
---|
[513] | 3027 | |
---|
[1931] | 3028 | @asaplog_post_dec |
---|
[2645] | 3029 | def chebyshev_baseline(self, insitu=None, mask=None, order=None, |
---|
| 3030 | clipthresh=None, clipniter=None, plot=None, |
---|
| 3031 | getresidual=None, showprogress=None, minnrow=None, |
---|
| 3032 | outlog=None, blfile=None, csvformat=None): |
---|
| 3033 | """\ |
---|
| 3034 | Return a scan which has been baselined (all rows) by Chebyshev polynomials. |
---|
| 3035 | |
---|
| 3036 | Parameters: |
---|
| 3037 | insitu: If False a new scantable is returned. |
---|
| 3038 | Otherwise, the scaling is done in-situ |
---|
| 3039 | The default is taken from .asaprc (False) |
---|
| 3040 | mask: An optional mask |
---|
| 3041 | order: the maximum order of Chebyshev polynomial (default is 5) |
---|
| 3042 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
| 3043 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 3044 | clipping (default is 0) |
---|
| 3045 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 3046 | plot the fit and the residual. In this each |
---|
| 3047 | indivual fit has to be approved, by typing 'y' |
---|
| 3048 | or 'n' |
---|
| 3049 | getresidual: if False, returns best-fit values instead of |
---|
| 3050 | residual. (default is True) |
---|
| 3051 | showprogress: show progress status for large data. |
---|
| 3052 | default is True. |
---|
| 3053 | minnrow: minimum number of input spectra to show. |
---|
| 3054 | default is 1000. |
---|
| 3055 | outlog: Output the coefficients of the best-fit |
---|
| 3056 | function to logger (default is False) |
---|
| 3057 | blfile: Name of a text file in which the best-fit |
---|
| 3058 | parameter values to be written |
---|
| 3059 | (default is "": no file/logger output) |
---|
| 3060 | csvformat: if True blfile is csv-formatted, default is False. |
---|
| 3061 | |
---|
| 3062 | Example: |
---|
| 3063 | # return a scan baselined by a cubic spline consisting of 2 pieces |
---|
| 3064 | # (i.e., 1 internal knot), |
---|
| 3065 | # also with 3-sigma clipping, iteration up to 4 times |
---|
| 3066 | bscan = scan.cspline_baseline(npiece=2,clipthresh=3.0,clipniter=4) |
---|
| 3067 | |
---|
| 3068 | Note: |
---|
| 3069 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 3070 | based on specunit of 'channel'. |
---|
| 3071 | """ |
---|
| 3072 | |
---|
| 3073 | try: |
---|
| 3074 | varlist = vars() |
---|
| 3075 | |
---|
| 3076 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 3077 | if insitu: |
---|
| 3078 | workscan = self |
---|
| 3079 | else: |
---|
| 3080 | workscan = self.copy() |
---|
| 3081 | |
---|
| 3082 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 3083 | if mask is None: mask = [] |
---|
| 3084 | if order is None: order = 5 |
---|
| 3085 | if clipthresh is None: clipthresh = 3.0 |
---|
| 3086 | if clipniter is None: clipniter = 0 |
---|
| 3087 | if plot is None: plot = False |
---|
| 3088 | if getresidual is None: getresidual = True |
---|
| 3089 | if showprogress is None: showprogress = True |
---|
| 3090 | if minnrow is None: minnrow = 1000 |
---|
| 3091 | if outlog is None: outlog = False |
---|
| 3092 | if blfile is None: blfile = '' |
---|
| 3093 | if csvformat is None: csvformat = False |
---|
| 3094 | |
---|
| 3095 | if csvformat: |
---|
| 3096 | scsvformat = "T" |
---|
| 3097 | else: |
---|
| 3098 | scsvformat = "F" |
---|
| 3099 | |
---|
| 3100 | #CURRENTLY, PLOT=true UNAVAILABLE UNTIL cubic spline fitting is implemented as a fitter method. |
---|
| 3101 | workscan._chebyshev_baseline(mask, order, clipthresh, clipniter, |
---|
| 3102 | getresidual, |
---|
| 3103 | pack_progress_params(showprogress, |
---|
| 3104 | minnrow), |
---|
| 3105 | outlog, scsvformat+blfile) |
---|
| 3106 | workscan._add_history("chebyshev_baseline", varlist) |
---|
| 3107 | |
---|
| 3108 | if insitu: |
---|
| 3109 | self._assign(workscan) |
---|
| 3110 | else: |
---|
| 3111 | return workscan |
---|
| 3112 | |
---|
| 3113 | except RuntimeError, e: |
---|
| 3114 | raise_fitting_failure_exception(e) |
---|
| 3115 | |
---|
| 3116 | @asaplog_post_dec |
---|
| 3117 | def auto_chebyshev_baseline(self, insitu=None, mask=None, order=None, |
---|
| 3118 | clipthresh=None, clipniter=None, |
---|
| 3119 | edge=None, threshold=None, chan_avg_limit=None, |
---|
| 3120 | getresidual=None, plot=None, |
---|
| 3121 | showprogress=None, minnrow=None, outlog=None, |
---|
| 3122 | blfile=None, csvformat=None): |
---|
| 3123 | """\ |
---|
| 3124 | Return a scan which has been baselined (all rows) by Chebyshev polynomials. |
---|
| 3125 | Spectral lines are detected first using linefinder and masked out |
---|
| 3126 | to avoid them affecting the baseline solution. |
---|
| 3127 | |
---|
| 3128 | Parameters: |
---|
| 3129 | insitu: if False a new scantable is returned. |
---|
| 3130 | Otherwise, the scaling is done in-situ |
---|
| 3131 | The default is taken from .asaprc (False) |
---|
| 3132 | mask: an optional mask retreived from scantable |
---|
| 3133 | order: the maximum order of Chebyshev polynomial (default is 5) |
---|
| 3134 | clipthresh: Clipping threshold. (default is 3.0, unit: sigma) |
---|
| 3135 | clipniter: maximum number of iteration of 'clipthresh'-sigma |
---|
| 3136 | clipping (default is 0) |
---|
| 3137 | edge: an optional number of channel to drop at |
---|
| 3138 | the edge of spectrum. If only one value is |
---|
| 3139 | specified, the same number will be dropped |
---|
| 3140 | from both sides of the spectrum. Default |
---|
| 3141 | is to keep all channels. Nested tuples |
---|
| 3142 | represent individual edge selection for |
---|
| 3143 | different IFs (a number of spectral channels |
---|
| 3144 | can be different) |
---|
| 3145 | threshold: the threshold used by line finder. It is |
---|
| 3146 | better to keep it large as only strong lines |
---|
| 3147 | affect the baseline solution. |
---|
| 3148 | chan_avg_limit: a maximum number of consequtive spectral |
---|
| 3149 | channels to average during the search of |
---|
| 3150 | weak and broad lines. The default is no |
---|
| 3151 | averaging (and no search for weak lines). |
---|
| 3152 | If such lines can affect the fitted baseline |
---|
| 3153 | (e.g. a high order polynomial is fitted), |
---|
| 3154 | increase this parameter (usually values up |
---|
| 3155 | to 8 are reasonable). Most users of this |
---|
| 3156 | method should find the default value sufficient. |
---|
| 3157 | plot: *** CURRENTLY UNAVAILABLE, ALWAYS FALSE *** |
---|
| 3158 | plot the fit and the residual. In this each |
---|
| 3159 | indivual fit has to be approved, by typing 'y' |
---|
| 3160 | or 'n' |
---|
| 3161 | getresidual: if False, returns best-fit values instead of |
---|
| 3162 | residual. (default is True) |
---|
| 3163 | showprogress: show progress status for large data. |
---|
| 3164 | default is True. |
---|
| 3165 | minnrow: minimum number of input spectra to show. |
---|
| 3166 | default is 1000. |
---|
| 3167 | outlog: Output the coefficients of the best-fit |
---|
| 3168 | function to logger (default is False) |
---|
| 3169 | blfile: Name of a text file in which the best-fit |
---|
| 3170 | parameter values to be written |
---|
| 3171 | (default is "": no file/logger output) |
---|
| 3172 | csvformat: if True blfile is csv-formatted, default is False. |
---|
| 3173 | |
---|
| 3174 | Example: |
---|
| 3175 | bscan = scan.auto_cspline_baseline(npiece=3, insitu=False) |
---|
| 3176 | |
---|
| 3177 | Note: |
---|
| 3178 | The best-fit parameter values output in logger and/or blfile are now |
---|
| 3179 | based on specunit of 'channel'. |
---|
| 3180 | """ |
---|
| 3181 | |
---|
| 3182 | try: |
---|
| 3183 | varlist = vars() |
---|
| 3184 | |
---|
| 3185 | if insitu is None: insitu = rcParams['insitu'] |
---|
| 3186 | if insitu: |
---|
| 3187 | workscan = self |
---|
| 3188 | else: |
---|
| 3189 | workscan = self.copy() |
---|
| 3190 | |
---|
| 3191 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 3192 | if mask is None: mask = [] |
---|
| 3193 | if order is None: order = 5 |
---|
| 3194 | if clipthresh is None: clipthresh = 3.0 |
---|
| 3195 | if clipniter is None: clipniter = 0 |
---|
| 3196 | if edge is None: edge = (0, 0) |
---|
| 3197 | if threshold is None: threshold = 3 |
---|
| 3198 | if chan_avg_limit is None: chan_avg_limit = 1 |
---|
| 3199 | if plot is None: plot = False |
---|
| 3200 | if getresidual is None: getresidual = True |
---|
| 3201 | if showprogress is None: showprogress = True |
---|
| 3202 | if minnrow is None: minnrow = 1000 |
---|
| 3203 | if outlog is None: outlog = False |
---|
| 3204 | if blfile is None: blfile = '' |
---|
| 3205 | if csvformat is None: csvformat = False |
---|
| 3206 | |
---|
| 3207 | if csvformat: |
---|
| 3208 | scsvformat = "T" |
---|
| 3209 | else: |
---|
| 3210 | scsvformat = "F" |
---|
| 3211 | |
---|
| 3212 | #CURRENTLY, PLOT=true UNAVAILABLE UNTIL cubic spline fitting is implemented as a fitter method. |
---|
| 3213 | workscan._auto_chebyshev_baseline(mask, order, clipthresh, |
---|
| 3214 | clipniter, |
---|
| 3215 | normalise_edge_param(edge), |
---|
| 3216 | threshold, |
---|
| 3217 | chan_avg_limit, getresidual, |
---|
| 3218 | pack_progress_params(showprogress, |
---|
| 3219 | minnrow), |
---|
| 3220 | outlog, scsvformat+blfile) |
---|
| 3221 | workscan._add_history("auto_chebyshev_baseline", varlist) |
---|
| 3222 | |
---|
| 3223 | if insitu: |
---|
| 3224 | self._assign(workscan) |
---|
| 3225 | else: |
---|
| 3226 | return workscan |
---|
| 3227 | |
---|
| 3228 | except RuntimeError, e: |
---|
| 3229 | raise_fitting_failure_exception(e) |
---|
| 3230 | |
---|
| 3231 | @asaplog_post_dec |
---|
[2269] | 3232 | def poly_baseline(self, mask=None, order=None, insitu=None, plot=None, |
---|
| 3233 | getresidual=None, showprogress=None, minnrow=None, |
---|
[2641] | 3234 | outlog=None, blfile=None, csvformat=None): |
---|
[1907] | 3235 | """\ |
---|
| 3236 | Return a scan which has been baselined (all rows) by a polynomial. |
---|
| 3237 | Parameters: |
---|
[2189] | 3238 | insitu: if False a new scantable is returned. |
---|
| 3239 | Otherwise, the scaling is done in-situ |
---|
| 3240 | The default is taken from .asaprc (False) |
---|
| 3241 | mask: an optional mask |
---|
| 3242 | order: the order of the polynomial (default is 0) |
---|
| 3243 | plot: plot the fit and the residual. In this each |
---|
| 3244 | indivual fit has to be approved, by typing 'y' |
---|
| 3245 | or 'n' |
---|
| 3246 | getresidual: if False, returns best-fit values instead of |
---|
| 3247 | residual. (default is True) |
---|
| 3248 | showprogress: show progress status for large data. |
---|
| 3249 | default is True. |
---|
| 3250 | minnrow: minimum number of input spectra to show. |
---|
| 3251 | default is 1000. |
---|
| 3252 | outlog: Output the coefficients of the best-fit |
---|
| 3253 | function to logger (default is False) |
---|
| 3254 | blfile: Name of a text file in which the best-fit |
---|
| 3255 | parameter values to be written |
---|
| 3256 | (default is "": no file/logger output) |
---|
[2641] | 3257 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[2012] | 3258 | |
---|
[1907] | 3259 | Example: |
---|
| 3260 | # return a scan baselined by a third order polynomial, |
---|
| 3261 | # not using a mask |
---|
| 3262 | bscan = scan.poly_baseline(order=3) |
---|
| 3263 | """ |
---|
[1931] | 3264 | |
---|
[2186] | 3265 | try: |
---|
| 3266 | varlist = vars() |
---|
[1931] | 3267 | |
---|
[2269] | 3268 | if insitu is None: |
---|
| 3269 | insitu = rcParams["insitu"] |
---|
[2186] | 3270 | if insitu: |
---|
| 3271 | workscan = self |
---|
| 3272 | else: |
---|
| 3273 | workscan = self.copy() |
---|
[1907] | 3274 | |
---|
[2410] | 3275 | #if mask is None: mask = [True for i in \ |
---|
| 3276 | # xrange(workscan.nchan())] |
---|
| 3277 | if mask is None: mask = [] |
---|
[2189] | 3278 | if order is None: order = 0 |
---|
| 3279 | if plot is None: plot = False |
---|
| 3280 | if getresidual is None: getresidual = True |
---|
| 3281 | if showprogress is None: showprogress = True |
---|
| 3282 | if minnrow is None: minnrow = 1000 |
---|
| 3283 | if outlog is None: outlog = False |
---|
| 3284 | if blfile is None: blfile = "" |
---|
[2641] | 3285 | if csvformat is None: csvformat = False |
---|
[1907] | 3286 | |
---|
[2641] | 3287 | if csvformat: |
---|
| 3288 | scsvformat = "T" |
---|
| 3289 | else: |
---|
| 3290 | scsvformat = "F" |
---|
| 3291 | |
---|
[2012] | 3292 | if plot: |
---|
[2269] | 3293 | outblfile = (blfile != "") and \ |
---|
[2349] | 3294 | os.path.exists(os.path.expanduser( |
---|
| 3295 | os.path.expandvars(blfile)) |
---|
| 3296 | ) |
---|
[2269] | 3297 | if outblfile: |
---|
| 3298 | blf = open(blfile, "a") |
---|
[2012] | 3299 | |
---|
[1907] | 3300 | f = fitter() |
---|
| 3301 | f.set_function(lpoly=order) |
---|
[2186] | 3302 | |
---|
| 3303 | rows = xrange(workscan.nrow()) |
---|
| 3304 | #if len(rows) > 0: workscan._init_blinfo() |
---|
[2610] | 3305 | |
---|
| 3306 | action = "H" |
---|
[1907] | 3307 | for r in rows: |
---|
| 3308 | f.x = workscan._getabcissa(r) |
---|
| 3309 | f.y = workscan._getspectrum(r) |
---|
[2541] | 3310 | if mask: |
---|
| 3311 | f.mask = mask_and(mask, workscan._getmask(r)) # (CAS-1434) |
---|
| 3312 | else: # mask=None |
---|
| 3313 | f.mask = workscan._getmask(r) |
---|
| 3314 | |
---|
[1907] | 3315 | f.data = None |
---|
| 3316 | f.fit() |
---|
[2541] | 3317 | |
---|
[2610] | 3318 | if action != "Y": # skip plotting when accepting all |
---|
| 3319 | f.plot(residual=True) |
---|
| 3320 | #accept_fit = raw_input("Accept fit ( [y]/n ): ") |
---|
| 3321 | #if accept_fit.upper() == "N": |
---|
| 3322 | # #workscan._append_blinfo(None, None, None) |
---|
| 3323 | # continue |
---|
| 3324 | accept_fit = self._get_verify_action("Accept fit?",action) |
---|
| 3325 | if r == 0: action = None |
---|
[1907] | 3326 | if accept_fit.upper() == "N": |
---|
| 3327 | continue |
---|
[2610] | 3328 | elif accept_fit.upper() == "R": |
---|
| 3329 | break |
---|
| 3330 | elif accept_fit.upper() == "A": |
---|
| 3331 | action = "Y" |
---|
[2012] | 3332 | |
---|
| 3333 | blpars = f.get_parameters() |
---|
| 3334 | masklist = workscan.get_masklist(f.mask, row=r, silent=True) |
---|
| 3335 | #workscan._append_blinfo(blpars, masklist, f.mask) |
---|
[2269] | 3336 | workscan._setspectrum((f.fitter.getresidual() |
---|
| 3337 | if getresidual else f.fitter.getfit()), r) |
---|
[1907] | 3338 | |
---|
[2012] | 3339 | if outblfile: |
---|
| 3340 | rms = workscan.get_rms(f.mask, r) |
---|
[2269] | 3341 | dataout = \ |
---|
| 3342 | workscan.format_blparams_row(blpars["params"], |
---|
| 3343 | blpars["fixed"], |
---|
| 3344 | rms, str(masklist), |
---|
[2641] | 3345 | r, True, csvformat) |
---|
[2012] | 3346 | blf.write(dataout) |
---|
| 3347 | |
---|
[1907] | 3348 | f._p.unmap() |
---|
| 3349 | f._p = None |
---|
[2012] | 3350 | |
---|
[2349] | 3351 | if outblfile: |
---|
| 3352 | blf.close() |
---|
[1907] | 3353 | else: |
---|
[2269] | 3354 | workscan._poly_baseline(mask, order, getresidual, |
---|
| 3355 | pack_progress_params(showprogress, |
---|
| 3356 | minnrow), |
---|
[2641] | 3357 | outlog, scsvformat+blfile) |
---|
[1907] | 3358 | |
---|
| 3359 | workscan._add_history("poly_baseline", varlist) |
---|
| 3360 | |
---|
| 3361 | if insitu: |
---|
| 3362 | self._assign(workscan) |
---|
| 3363 | else: |
---|
| 3364 | return workscan |
---|
| 3365 | |
---|
[1919] | 3366 | except RuntimeError, e: |
---|
[2186] | 3367 | raise_fitting_failure_exception(e) |
---|
[1907] | 3368 | |
---|
[2186] | 3369 | @asaplog_post_dec |
---|
[2269] | 3370 | def auto_poly_baseline(self, mask=None, order=None, edge=None, |
---|
| 3371 | threshold=None, chan_avg_limit=None, |
---|
| 3372 | plot=None, insitu=None, |
---|
| 3373 | getresidual=None, showprogress=None, |
---|
[2641] | 3374 | minnrow=None, outlog=None, blfile=None, csvformat=None): |
---|
[1846] | 3375 | """\ |
---|
[1931] | 3376 | Return a scan which has been baselined (all rows) by a polynomial. |
---|
[880] | 3377 | Spectral lines are detected first using linefinder and masked out |
---|
| 3378 | to avoid them affecting the baseline solution. |
---|
| 3379 | |
---|
| 3380 | Parameters: |
---|
[2189] | 3381 | insitu: if False a new scantable is returned. |
---|
| 3382 | Otherwise, the scaling is done in-situ |
---|
| 3383 | The default is taken from .asaprc (False) |
---|
| 3384 | mask: an optional mask retreived from scantable |
---|
| 3385 | order: the order of the polynomial (default is 0) |
---|
| 3386 | edge: an optional number of channel to drop at |
---|
| 3387 | the edge of spectrum. If only one value is |
---|
| 3388 | specified, the same number will be dropped |
---|
| 3389 | from both sides of the spectrum. Default |
---|
| 3390 | is to keep all channels. Nested tuples |
---|
| 3391 | represent individual edge selection for |
---|
| 3392 | different IFs (a number of spectral channels |
---|
| 3393 | can be different) |
---|
| 3394 | threshold: the threshold used by line finder. It is |
---|
| 3395 | better to keep it large as only strong lines |
---|
| 3396 | affect the baseline solution. |
---|
| 3397 | chan_avg_limit: a maximum number of consequtive spectral |
---|
| 3398 | channels to average during the search of |
---|
| 3399 | weak and broad lines. The default is no |
---|
| 3400 | averaging (and no search for weak lines). |
---|
| 3401 | If such lines can affect the fitted baseline |
---|
| 3402 | (e.g. a high order polynomial is fitted), |
---|
| 3403 | increase this parameter (usually values up |
---|
| 3404 | to 8 are reasonable). Most users of this |
---|
| 3405 | method should find the default value sufficient. |
---|
| 3406 | plot: plot the fit and the residual. In this each |
---|
| 3407 | indivual fit has to be approved, by typing 'y' |
---|
| 3408 | or 'n' |
---|
| 3409 | getresidual: if False, returns best-fit values instead of |
---|
| 3410 | residual. (default is True) |
---|
| 3411 | showprogress: show progress status for large data. |
---|
| 3412 | default is True. |
---|
| 3413 | minnrow: minimum number of input spectra to show. |
---|
| 3414 | default is 1000. |
---|
| 3415 | outlog: Output the coefficients of the best-fit |
---|
| 3416 | function to logger (default is False) |
---|
| 3417 | blfile: Name of a text file in which the best-fit |
---|
| 3418 | parameter values to be written |
---|
| 3419 | (default is "": no file/logger output) |
---|
[2641] | 3420 | csvformat: if True blfile is csv-formatted, default is False. |
---|
[1846] | 3421 | |
---|
[2012] | 3422 | Example: |
---|
| 3423 | bscan = scan.auto_poly_baseline(order=7, insitu=False) |
---|
| 3424 | """ |
---|
[880] | 3425 | |
---|
[2186] | 3426 | try: |
---|
| 3427 | varlist = vars() |
---|
[1846] | 3428 | |
---|
[2269] | 3429 | if insitu is None: |
---|
| 3430 | insitu = rcParams['insitu'] |
---|
[2186] | 3431 | if insitu: |
---|
| 3432 | workscan = self |
---|
| 3433 | else: |
---|
| 3434 | workscan = self.copy() |
---|
[1846] | 3435 | |
---|
[2410] | 3436 | #if mask is None: mask = [True for i in xrange(workscan.nchan())] |
---|
| 3437 | if mask is None: mask = [] |
---|
[2186] | 3438 | if order is None: order = 0 |
---|
| 3439 | if edge is None: edge = (0, 0) |
---|
| 3440 | if threshold is None: threshold = 3 |
---|
| 3441 | if chan_avg_limit is None: chan_avg_limit = 1 |
---|
| 3442 | if plot is None: plot = False |
---|
| 3443 | if getresidual is None: getresidual = True |
---|
[2189] | 3444 | if showprogress is None: showprogress = True |
---|
| 3445 | if minnrow is None: minnrow = 1000 |
---|
[2186] | 3446 | if outlog is None: outlog = False |
---|
| 3447 | if blfile is None: blfile = '' |
---|
[2641] | 3448 | if csvformat is None: csvformat = False |
---|
[1846] | 3449 | |
---|
[2641] | 3450 | if csvformat: |
---|
| 3451 | scsvformat = "T" |
---|
| 3452 | else: |
---|
| 3453 | scsvformat = "F" |
---|
| 3454 | |
---|
[2186] | 3455 | edge = normalise_edge_param(edge) |
---|
[880] | 3456 | |
---|
[2012] | 3457 | if plot: |
---|
[2269] | 3458 | outblfile = (blfile != "") and \ |
---|
| 3459 | os.path.exists(os.path.expanduser(os.path.expandvars(blfile))) |
---|
[2012] | 3460 | if outblfile: blf = open(blfile, "a") |
---|
| 3461 | |
---|
[2186] | 3462 | from asap.asaplinefind import linefinder |
---|
[2012] | 3463 | fl = linefinder() |
---|
[2269] | 3464 | fl.set_options(threshold=threshold, avg_limit=chan_avg_limit) |
---|
[2012] | 3465 | fl.set_scan(workscan) |
---|
[2186] | 3466 | |
---|
[2012] | 3467 | f = fitter() |
---|
| 3468 | f.set_function(lpoly=order) |
---|
[880] | 3469 | |
---|
[2186] | 3470 | rows = xrange(workscan.nrow()) |
---|
| 3471 | #if len(rows) > 0: workscan._init_blinfo() |
---|
[2610] | 3472 | |
---|
| 3473 | action = "H" |
---|
[2012] | 3474 | for r in rows: |
---|
[2186] | 3475 | idx = 2*workscan.getif(r) |
---|
[2541] | 3476 | if mask: |
---|
| 3477 | msk = mask_and(mask, workscan._getmask(r)) # (CAS-1434) |
---|
| 3478 | else: # mask=None |
---|
| 3479 | msk = workscan._getmask(r) |
---|
| 3480 | fl.find_lines(r, msk, edge[idx:idx+2]) |
---|
[907] | 3481 | |
---|
[2012] | 3482 | f.x = workscan._getabcissa(r) |
---|
| 3483 | f.y = workscan._getspectrum(r) |
---|
| 3484 | f.mask = fl.get_mask() |
---|
| 3485 | f.data = None |
---|
| 3486 | f.fit() |
---|
| 3487 | |
---|
[2610] | 3488 | if action != "Y": # skip plotting when accepting all |
---|
| 3489 | f.plot(residual=True) |
---|
| 3490 | #accept_fit = raw_input("Accept fit ( [y]/n ): ") |
---|
| 3491 | accept_fit = self._get_verify_action("Accept fit?",action) |
---|
| 3492 | if r == 0: action = None |
---|
[2012] | 3493 | if accept_fit.upper() == "N": |
---|
| 3494 | #workscan._append_blinfo(None, None, None) |
---|
| 3495 | continue |
---|
[2610] | 3496 | elif accept_fit.upper() == "R": |
---|
| 3497 | break |
---|
| 3498 | elif accept_fit.upper() == "A": |
---|
| 3499 | action = "Y" |
---|
[2012] | 3500 | |
---|
| 3501 | blpars = f.get_parameters() |
---|
| 3502 | masklist = workscan.get_masklist(f.mask, row=r, silent=True) |
---|
| 3503 | #workscan._append_blinfo(blpars, masklist, f.mask) |
---|
[2349] | 3504 | workscan._setspectrum( |
---|
| 3505 | (f.fitter.getresidual() if getresidual |
---|
| 3506 | else f.fitter.getfit()), r |
---|
| 3507 | ) |
---|
[2012] | 3508 | |
---|
| 3509 | if outblfile: |
---|
| 3510 | rms = workscan.get_rms(f.mask, r) |
---|
[2269] | 3511 | dataout = \ |
---|
| 3512 | workscan.format_blparams_row(blpars["params"], |
---|
| 3513 | blpars["fixed"], |
---|
| 3514 | rms, str(masklist), |
---|
[2641] | 3515 | r, True, csvformat) |
---|
[2012] | 3516 | blf.write(dataout) |
---|
| 3517 | |
---|
| 3518 | f._p.unmap() |
---|
| 3519 | f._p = None |
---|
| 3520 | |
---|
| 3521 | if outblfile: blf.close() |
---|
| 3522 | else: |
---|
[2269] | 3523 | workscan._auto_poly_baseline(mask, order, edge, threshold, |
---|
| 3524 | chan_avg_limit, getresidual, |
---|
| 3525 | pack_progress_params(showprogress, |
---|
| 3526 | minnrow), |
---|
[2641] | 3527 | outlog, scsvformat+blfile) |
---|
[2012] | 3528 | |
---|
| 3529 | workscan._add_history("auto_poly_baseline", varlist) |
---|
| 3530 | |
---|
| 3531 | if insitu: |
---|
| 3532 | self._assign(workscan) |
---|
| 3533 | else: |
---|
| 3534 | return workscan |
---|
| 3535 | |
---|
| 3536 | except RuntimeError, e: |
---|
[2186] | 3537 | raise_fitting_failure_exception(e) |
---|
[2012] | 3538 | |
---|
| 3539 | def _init_blinfo(self): |
---|
| 3540 | """\ |
---|
| 3541 | Initialise the following three auxiliary members: |
---|
| 3542 | blpars : parameters of the best-fit baseline, |
---|
| 3543 | masklists : mask data (edge positions of masked channels) and |
---|
| 3544 | actualmask : mask data (in boolean list), |
---|
| 3545 | to keep for use later (including output to logger/text files). |
---|
| 3546 | Used by poly_baseline() and auto_poly_baseline() in case of |
---|
| 3547 | 'plot=True'. |
---|
| 3548 | """ |
---|
| 3549 | self.blpars = [] |
---|
| 3550 | self.masklists = [] |
---|
| 3551 | self.actualmask = [] |
---|
| 3552 | return |
---|
[880] | 3553 | |
---|
[2012] | 3554 | def _append_blinfo(self, data_blpars, data_masklists, data_actualmask): |
---|
| 3555 | """\ |
---|
| 3556 | Append baseline-fitting related info to blpars, masklist and |
---|
| 3557 | actualmask. |
---|
| 3558 | """ |
---|
| 3559 | self.blpars.append(data_blpars) |
---|
| 3560 | self.masklists.append(data_masklists) |
---|
| 3561 | self.actualmask.append(data_actualmask) |
---|
| 3562 | return |
---|
| 3563 | |
---|
[1862] | 3564 | @asaplog_post_dec |
---|
[914] | 3565 | def rotate_linpolphase(self, angle): |
---|
[1846] | 3566 | """\ |
---|
[914] | 3567 | Rotate the phase of the complex polarization O=Q+iU correlation. |
---|
| 3568 | This is always done in situ in the raw data. So if you call this |
---|
| 3569 | function more than once then each call rotates the phase further. |
---|
[1846] | 3570 | |
---|
[914] | 3571 | Parameters: |
---|
[1846] | 3572 | |
---|
[914] | 3573 | angle: The angle (degrees) to rotate (add) by. |
---|
[1846] | 3574 | |
---|
| 3575 | Example:: |
---|
| 3576 | |
---|
[914] | 3577 | scan.rotate_linpolphase(2.3) |
---|
[1846] | 3578 | |
---|
[914] | 3579 | """ |
---|
| 3580 | varlist = vars() |
---|
[936] | 3581 | self._math._rotate_linpolphase(self, angle) |
---|
[914] | 3582 | self._add_history("rotate_linpolphase", varlist) |
---|
| 3583 | return |
---|
[710] | 3584 | |
---|
[1862] | 3585 | @asaplog_post_dec |
---|
[914] | 3586 | def rotate_xyphase(self, angle): |
---|
[1846] | 3587 | """\ |
---|
[914] | 3588 | Rotate the phase of the XY correlation. This is always done in situ |
---|
| 3589 | in the data. So if you call this function more than once |
---|
| 3590 | then each call rotates the phase further. |
---|
[1846] | 3591 | |
---|
[914] | 3592 | Parameters: |
---|
[1846] | 3593 | |
---|
[914] | 3594 | angle: The angle (degrees) to rotate (add) by. |
---|
[1846] | 3595 | |
---|
| 3596 | Example:: |
---|
| 3597 | |
---|
[914] | 3598 | scan.rotate_xyphase(2.3) |
---|
[1846] | 3599 | |
---|
[914] | 3600 | """ |
---|
| 3601 | varlist = vars() |
---|
[936] | 3602 | self._math._rotate_xyphase(self, angle) |
---|
[914] | 3603 | self._add_history("rotate_xyphase", varlist) |
---|
| 3604 | return |
---|
| 3605 | |
---|
[1862] | 3606 | @asaplog_post_dec |
---|
[914] | 3607 | def swap_linears(self): |
---|
[1846] | 3608 | """\ |
---|
[1573] | 3609 | Swap the linear polarisations XX and YY, or better the first two |
---|
[1348] | 3610 | polarisations as this also works for ciculars. |
---|
[914] | 3611 | """ |
---|
| 3612 | varlist = vars() |
---|
[936] | 3613 | self._math._swap_linears(self) |
---|
[914] | 3614 | self._add_history("swap_linears", varlist) |
---|
| 3615 | return |
---|
| 3616 | |
---|
[1862] | 3617 | @asaplog_post_dec |
---|
[914] | 3618 | def invert_phase(self): |
---|
[1846] | 3619 | """\ |
---|
[914] | 3620 | Invert the phase of the complex polarisation |
---|
| 3621 | """ |
---|
| 3622 | varlist = vars() |
---|
[936] | 3623 | self._math._invert_phase(self) |
---|
[914] | 3624 | self._add_history("invert_phase", varlist) |
---|
| 3625 | return |
---|
| 3626 | |
---|
[1862] | 3627 | @asaplog_post_dec |
---|
[876] | 3628 | def add(self, offset, insitu=None): |
---|
[1846] | 3629 | """\ |
---|
[513] | 3630 | Return a scan where all spectra have the offset added |
---|
[1846] | 3631 | |
---|
[513] | 3632 | Parameters: |
---|
[1846] | 3633 | |
---|
[513] | 3634 | offset: the offset |
---|
[1855] | 3635 | |
---|
[513] | 3636 | insitu: if False a new scantable is returned. |
---|
| 3637 | Otherwise, the scaling is done in-situ |
---|
| 3638 | The default is taken from .asaprc (False) |
---|
[1846] | 3639 | |
---|
[513] | 3640 | """ |
---|
| 3641 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 3642 | self._math._setinsitu(insitu) |
---|
[513] | 3643 | varlist = vars() |
---|
[876] | 3644 | s = scantable(self._math._unaryop(self, offset, "ADD", False)) |
---|
[1118] | 3645 | s._add_history("add", varlist) |
---|
[876] | 3646 | if insitu: |
---|
| 3647 | self._assign(s) |
---|
| 3648 | else: |
---|
[513] | 3649 | return s |
---|
| 3650 | |
---|
[1862] | 3651 | @asaplog_post_dec |
---|
[1308] | 3652 | def scale(self, factor, tsys=True, insitu=None): |
---|
[1846] | 3653 | """\ |
---|
| 3654 | |
---|
[1938] | 3655 | Return a scan where all spectra are scaled by the given 'factor' |
---|
[1846] | 3656 | |
---|
[513] | 3657 | Parameters: |
---|
[1846] | 3658 | |
---|
[1819] | 3659 | factor: the scaling factor (float or 1D float list) |
---|
[1855] | 3660 | |
---|
[513] | 3661 | insitu: if False a new scantable is returned. |
---|
| 3662 | Otherwise, the scaling is done in-situ |
---|
| 3663 | The default is taken from .asaprc (False) |
---|
[1855] | 3664 | |
---|
[513] | 3665 | tsys: if True (default) then apply the operation to Tsys |
---|
| 3666 | as well as the data |
---|
[1846] | 3667 | |
---|
[513] | 3668 | """ |
---|
| 3669 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 3670 | self._math._setinsitu(insitu) |
---|
[513] | 3671 | varlist = vars() |
---|
[1819] | 3672 | s = None |
---|
| 3673 | import numpy |
---|
| 3674 | if isinstance(factor, list) or isinstance(factor, numpy.ndarray): |
---|
[2320] | 3675 | if isinstance(factor[0], list) or isinstance(factor[0], |
---|
| 3676 | numpy.ndarray): |
---|
[1819] | 3677 | from asapmath import _array2dOp |
---|
[2320] | 3678 | s = _array2dOp( self, factor, "MUL", tsys, insitu ) |
---|
[1819] | 3679 | else: |
---|
[2320] | 3680 | s = scantable( self._math._arrayop( self, factor, |
---|
| 3681 | "MUL", tsys ) ) |
---|
[1819] | 3682 | else: |
---|
[2320] | 3683 | s = scantable(self._math._unaryop(self, factor, "MUL", tsys)) |
---|
[1118] | 3684 | s._add_history("scale", varlist) |
---|
[876] | 3685 | if insitu: |
---|
| 3686 | self._assign(s) |
---|
| 3687 | else: |
---|
[513] | 3688 | return s |
---|
| 3689 | |
---|
[2349] | 3690 | @preserve_selection |
---|
| 3691 | def set_sourcetype(self, match, matchtype="pattern", |
---|
[1504] | 3692 | sourcetype="reference"): |
---|
[1846] | 3693 | """\ |
---|
[1502] | 3694 | Set the type of the source to be an source or reference scan |
---|
[1846] | 3695 | using the provided pattern. |
---|
| 3696 | |
---|
[1502] | 3697 | Parameters: |
---|
[1846] | 3698 | |
---|
[1504] | 3699 | match: a Unix style pattern, regular expression or selector |
---|
[1855] | 3700 | |
---|
[1504] | 3701 | matchtype: 'pattern' (default) UNIX style pattern or |
---|
| 3702 | 'regex' regular expression |
---|
[1855] | 3703 | |
---|
[1502] | 3704 | sourcetype: the type of the source to use (source/reference) |
---|
[1846] | 3705 | |
---|
[1502] | 3706 | """ |
---|
| 3707 | varlist = vars() |
---|
| 3708 | stype = -1 |
---|
[2480] | 3709 | if sourcetype.lower().startswith("r") or sourcetype.lower() == "off": |
---|
[1502] | 3710 | stype = 1 |
---|
[2480] | 3711 | elif sourcetype.lower().startswith("s") or sourcetype.lower() == "on": |
---|
[1502] | 3712 | stype = 0 |
---|
[1504] | 3713 | else: |
---|
[2480] | 3714 | raise ValueError("Illegal sourcetype use s(ource)/on or r(eference)/off") |
---|
[1504] | 3715 | if matchtype.lower().startswith("p"): |
---|
| 3716 | matchtype = "pattern" |
---|
| 3717 | elif matchtype.lower().startswith("r"): |
---|
| 3718 | matchtype = "regex" |
---|
| 3719 | else: |
---|
| 3720 | raise ValueError("Illegal matchtype, use p(attern) or r(egex)") |
---|
[1502] | 3721 | sel = selector() |
---|
| 3722 | if isinstance(match, selector): |
---|
| 3723 | sel = match |
---|
| 3724 | else: |
---|
[2480] | 3725 | sel.set_query("SRCNAME=%s('%s')" % (matchtype, match)) |
---|
| 3726 | self.set_selection(sel) |
---|
[1502] | 3727 | self._setsourcetype(stype) |
---|
[1573] | 3728 | self._add_history("set_sourcetype", varlist) |
---|
[1502] | 3729 | |
---|
[1862] | 3730 | @asaplog_post_dec |
---|
[1857] | 3731 | @preserve_selection |
---|
[1819] | 3732 | def auto_quotient(self, preserve=True, mode='paired', verify=False): |
---|
[1846] | 3733 | """\ |
---|
[670] | 3734 | This function allows to build quotients automatically. |
---|
[1819] | 3735 | It assumes the observation to have the same number of |
---|
[670] | 3736 | "ons" and "offs" |
---|
[1846] | 3737 | |
---|
[670] | 3738 | Parameters: |
---|
[1846] | 3739 | |
---|
[710] | 3740 | preserve: you can preserve (default) the continuum or |
---|
| 3741 | remove it. The equations used are |
---|
[1857] | 3742 | |
---|
[670] | 3743 | preserve: Output = Toff * (on/off) - Toff |
---|
[1857] | 3744 | |
---|
[1070] | 3745 | remove: Output = Toff * (on/off) - Ton |
---|
[1855] | 3746 | |
---|
[1573] | 3747 | mode: the on/off detection mode |
---|
[1348] | 3748 | 'paired' (default) |
---|
| 3749 | identifies 'off' scans by the |
---|
| 3750 | trailing '_R' (Mopra/Parkes) or |
---|
| 3751 | '_e'/'_w' (Tid) and matches |
---|
| 3752 | on/off pairs from the observing pattern |
---|
[1502] | 3753 | 'time' |
---|
| 3754 | finds the closest off in time |
---|
[1348] | 3755 | |
---|
[1857] | 3756 | .. todo:: verify argument is not implemented |
---|
| 3757 | |
---|
[670] | 3758 | """ |
---|
[1857] | 3759 | varlist = vars() |
---|
[1348] | 3760 | modes = ["time", "paired"] |
---|
[670] | 3761 | if not mode in modes: |
---|
[876] | 3762 | msg = "please provide valid mode. Valid modes are %s" % (modes) |
---|
| 3763 | raise ValueError(msg) |
---|
[1348] | 3764 | s = None |
---|
| 3765 | if mode.lower() == "paired": |
---|
[1857] | 3766 | sel = self.get_selection() |
---|
[1875] | 3767 | sel.set_query("SRCTYPE==psoff") |
---|
[1356] | 3768 | self.set_selection(sel) |
---|
[1348] | 3769 | offs = self.copy() |
---|
[1875] | 3770 | sel.set_query("SRCTYPE==pson") |
---|
[1356] | 3771 | self.set_selection(sel) |
---|
[1348] | 3772 | ons = self.copy() |
---|
| 3773 | s = scantable(self._math._quotient(ons, offs, preserve)) |
---|
| 3774 | elif mode.lower() == "time": |
---|
| 3775 | s = scantable(self._math._auto_quotient(self, mode, preserve)) |
---|
[1118] | 3776 | s._add_history("auto_quotient", varlist) |
---|
[876] | 3777 | return s |
---|
[710] | 3778 | |
---|
[1862] | 3779 | @asaplog_post_dec |
---|
[1145] | 3780 | def mx_quotient(self, mask = None, weight='median', preserve=True): |
---|
[1846] | 3781 | """\ |
---|
[1143] | 3782 | Form a quotient using "off" beams when observing in "MX" mode. |
---|
[1846] | 3783 | |
---|
[1143] | 3784 | Parameters: |
---|
[1846] | 3785 | |
---|
[1145] | 3786 | mask: an optional mask to be used when weight == 'stddev' |
---|
[1855] | 3787 | |
---|
[1143] | 3788 | weight: How to average the off beams. Default is 'median'. |
---|
[1855] | 3789 | |
---|
[1145] | 3790 | preserve: you can preserve (default) the continuum or |
---|
[1855] | 3791 | remove it. The equations used are: |
---|
[1846] | 3792 | |
---|
[1855] | 3793 | preserve: Output = Toff * (on/off) - Toff |
---|
| 3794 | |
---|
| 3795 | remove: Output = Toff * (on/off) - Ton |
---|
| 3796 | |
---|
[1217] | 3797 | """ |
---|
[1593] | 3798 | mask = mask or () |
---|
[1141] | 3799 | varlist = vars() |
---|
| 3800 | on = scantable(self._math._mx_extract(self, 'on')) |
---|
[1143] | 3801 | preoff = scantable(self._math._mx_extract(self, 'off')) |
---|
| 3802 | off = preoff.average_time(mask=mask, weight=weight, scanav=False) |
---|
[1217] | 3803 | from asapmath import quotient |
---|
[1145] | 3804 | q = quotient(on, off, preserve) |
---|
[1143] | 3805 | q._add_history("mx_quotient", varlist) |
---|
[1217] | 3806 | return q |
---|
[513] | 3807 | |
---|
[1862] | 3808 | @asaplog_post_dec |
---|
[718] | 3809 | def freq_switch(self, insitu=None): |
---|
[1846] | 3810 | """\ |
---|
[718] | 3811 | Apply frequency switching to the data. |
---|
[1846] | 3812 | |
---|
[718] | 3813 | Parameters: |
---|
[1846] | 3814 | |
---|
[718] | 3815 | insitu: if False a new scantable is returned. |
---|
| 3816 | Otherwise, the swictching is done in-situ |
---|
| 3817 | The default is taken from .asaprc (False) |
---|
[1846] | 3818 | |
---|
[718] | 3819 | """ |
---|
| 3820 | if insitu is None: insitu = rcParams['insitu'] |
---|
[876] | 3821 | self._math._setinsitu(insitu) |
---|
[718] | 3822 | varlist = vars() |
---|
[876] | 3823 | s = scantable(self._math._freqswitch(self)) |
---|
[1118] | 3824 | s._add_history("freq_switch", varlist) |
---|
[1856] | 3825 | if insitu: |
---|
| 3826 | self._assign(s) |
---|
| 3827 | else: |
---|
| 3828 | return s |
---|
[718] | 3829 | |
---|
[1862] | 3830 | @asaplog_post_dec |
---|
[780] | 3831 | def recalc_azel(self): |
---|
[1846] | 3832 | """Recalculate the azimuth and elevation for each position.""" |
---|
[780] | 3833 | varlist = vars() |
---|
[876] | 3834 | self._recalcazel() |
---|
[780] | 3835 | self._add_history("recalc_azel", varlist) |
---|
| 3836 | return |
---|
| 3837 | |
---|
[1862] | 3838 | @asaplog_post_dec |
---|
[513] | 3839 | def __add__(self, other): |
---|
[2574] | 3840 | """ |
---|
| 3841 | implicit on all axes and on Tsys |
---|
| 3842 | """ |
---|
[513] | 3843 | varlist = vars() |
---|
[2574] | 3844 | s = self.__op( other, "ADD" ) |
---|
[513] | 3845 | s._add_history("operator +", varlist) |
---|
| 3846 | return s |
---|
| 3847 | |
---|
[1862] | 3848 | @asaplog_post_dec |
---|
[513] | 3849 | def __sub__(self, other): |
---|
| 3850 | """ |
---|
| 3851 | implicit on all axes and on Tsys |
---|
| 3852 | """ |
---|
| 3853 | varlist = vars() |
---|
[2574] | 3854 | s = self.__op( other, "SUB" ) |
---|
[513] | 3855 | s._add_history("operator -", varlist) |
---|
| 3856 | return s |
---|
[710] | 3857 | |
---|
[1862] | 3858 | @asaplog_post_dec |
---|
[513] | 3859 | def __mul__(self, other): |
---|
| 3860 | """ |
---|
| 3861 | implicit on all axes and on Tsys |
---|
| 3862 | """ |
---|
| 3863 | varlist = vars() |
---|
[2574] | 3864 | s = self.__op( other, "MUL" ) ; |
---|
[513] | 3865 | s._add_history("operator *", varlist) |
---|
| 3866 | return s |
---|
| 3867 | |
---|
[710] | 3868 | |
---|
[1862] | 3869 | @asaplog_post_dec |
---|
[513] | 3870 | def __div__(self, other): |
---|
| 3871 | """ |
---|
| 3872 | implicit on all axes and on Tsys |
---|
| 3873 | """ |
---|
| 3874 | varlist = vars() |
---|
[2574] | 3875 | s = self.__op( other, "DIV" ) |
---|
| 3876 | s._add_history("operator /", varlist) |
---|
| 3877 | return s |
---|
| 3878 | |
---|
| 3879 | @asaplog_post_dec |
---|
| 3880 | def __op( self, other, mode ): |
---|
[513] | 3881 | s = None |
---|
| 3882 | if isinstance(other, scantable): |
---|
[2574] | 3883 | s = scantable(self._math._binaryop(self, other, mode)) |
---|
[513] | 3884 | elif isinstance(other, float): |
---|
| 3885 | if other == 0.0: |
---|
[718] | 3886 | raise ZeroDivisionError("Dividing by zero is not recommended") |
---|
[2574] | 3887 | s = scantable(self._math._unaryop(self, other, mode, False)) |
---|
[2144] | 3888 | elif isinstance(other, list) or isinstance(other, numpy.ndarray): |
---|
[2349] | 3889 | if isinstance(other[0], list) \ |
---|
| 3890 | or isinstance(other[0], numpy.ndarray): |
---|
[2144] | 3891 | from asapmath import _array2dOp |
---|
[2574] | 3892 | s = _array2dOp( self, other, mode, False ) |
---|
[2144] | 3893 | else: |
---|
[2574] | 3894 | s = scantable( self._math._arrayop( self, other, |
---|
| 3895 | mode, False ) ) |
---|
[513] | 3896 | else: |
---|
[718] | 3897 | raise TypeError("Other input is not a scantable or float value") |
---|
[513] | 3898 | return s |
---|
| 3899 | |
---|
[1862] | 3900 | @asaplog_post_dec |
---|
[530] | 3901 | def get_fit(self, row=0): |
---|
[1846] | 3902 | """\ |
---|
[530] | 3903 | Print or return the stored fits for a row in the scantable |
---|
[1846] | 3904 | |
---|
[530] | 3905 | Parameters: |
---|
[1846] | 3906 | |
---|
[530] | 3907 | row: the row which the fit has been applied to. |
---|
[1846] | 3908 | |
---|
[530] | 3909 | """ |
---|
| 3910 | if row > self.nrow(): |
---|
| 3911 | return |
---|
[976] | 3912 | from asap.asapfit import asapfit |
---|
[530] | 3913 | fit = asapfit(self._getfit(row)) |
---|
[1859] | 3914 | asaplog.push( '%s' %(fit) ) |
---|
| 3915 | return fit.as_dict() |
---|
[530] | 3916 | |
---|
[2349] | 3917 | @preserve_selection |
---|
[1483] | 3918 | def flag_nans(self): |
---|
[1846] | 3919 | """\ |
---|
[1483] | 3920 | Utility function to flag NaN values in the scantable. |
---|
| 3921 | """ |
---|
| 3922 | import numpy |
---|
| 3923 | basesel = self.get_selection() |
---|
| 3924 | for i in range(self.nrow()): |
---|
[1589] | 3925 | sel = self.get_row_selector(i) |
---|
| 3926 | self.set_selection(basesel+sel) |
---|
[1483] | 3927 | nans = numpy.isnan(self._getspectrum(0)) |
---|
| 3928 | if numpy.any(nans): |
---|
| 3929 | bnans = [ bool(v) for v in nans] |
---|
| 3930 | self.flag(bnans) |
---|
| 3931 | |
---|
[1588] | 3932 | def get_row_selector(self, rowno): |
---|
[1992] | 3933 | return selector(rows=[rowno]) |
---|
[1573] | 3934 | |
---|
[484] | 3935 | def _add_history(self, funcname, parameters): |
---|
[1435] | 3936 | if not rcParams['scantable.history']: |
---|
| 3937 | return |
---|
[484] | 3938 | # create date |
---|
| 3939 | sep = "##" |
---|
| 3940 | from datetime import datetime |
---|
| 3941 | dstr = datetime.now().strftime('%Y/%m/%d %H:%M:%S') |
---|
| 3942 | hist = dstr+sep |
---|
| 3943 | hist += funcname+sep#cdate+sep |
---|
[2349] | 3944 | if parameters.has_key('self'): |
---|
| 3945 | del parameters['self'] |
---|
[1118] | 3946 | for k, v in parameters.iteritems(): |
---|
[484] | 3947 | if type(v) is dict: |
---|
[1118] | 3948 | for k2, v2 in v.iteritems(): |
---|
[484] | 3949 | hist += k2 |
---|
| 3950 | hist += "=" |
---|
[1118] | 3951 | if isinstance(v2, scantable): |
---|
[484] | 3952 | hist += 'scantable' |
---|
| 3953 | elif k2 == 'mask': |
---|
[1118] | 3954 | if isinstance(v2, list) or isinstance(v2, tuple): |
---|
[513] | 3955 | hist += str(self._zip_mask(v2)) |
---|
| 3956 | else: |
---|
| 3957 | hist += str(v2) |
---|
[484] | 3958 | else: |
---|
[513] | 3959 | hist += str(v2) |
---|
[484] | 3960 | else: |
---|
| 3961 | hist += k |
---|
| 3962 | hist += "=" |
---|
[1118] | 3963 | if isinstance(v, scantable): |
---|
[484] | 3964 | hist += 'scantable' |
---|
| 3965 | elif k == 'mask': |
---|
[1118] | 3966 | if isinstance(v, list) or isinstance(v, tuple): |
---|
[513] | 3967 | hist += str(self._zip_mask(v)) |
---|
| 3968 | else: |
---|
| 3969 | hist += str(v) |
---|
[484] | 3970 | else: |
---|
| 3971 | hist += str(v) |
---|
| 3972 | hist += sep |
---|
| 3973 | hist = hist[:-2] # remove trailing '##' |
---|
| 3974 | self._addhistory(hist) |
---|
| 3975 | |
---|
[710] | 3976 | |
---|
[484] | 3977 | def _zip_mask(self, mask): |
---|
| 3978 | mask = list(mask) |
---|
| 3979 | i = 0 |
---|
| 3980 | segments = [] |
---|
| 3981 | while mask[i:].count(1): |
---|
| 3982 | i += mask[i:].index(1) |
---|
| 3983 | if mask[i:].count(0): |
---|
| 3984 | j = i + mask[i:].index(0) |
---|
| 3985 | else: |
---|
[710] | 3986 | j = len(mask) |
---|
[1118] | 3987 | segments.append([i, j]) |
---|
[710] | 3988 | i = j |
---|
[484] | 3989 | return segments |
---|
[714] | 3990 | |
---|
[626] | 3991 | def _get_ordinate_label(self): |
---|
| 3992 | fu = "("+self.get_fluxunit()+")" |
---|
| 3993 | import re |
---|
| 3994 | lbl = "Intensity" |
---|
[1118] | 3995 | if re.match(".K.", fu): |
---|
[626] | 3996 | lbl = "Brightness Temperature "+ fu |
---|
[1118] | 3997 | elif re.match(".Jy.", fu): |
---|
[626] | 3998 | lbl = "Flux density "+ fu |
---|
| 3999 | return lbl |
---|
[710] | 4000 | |
---|
[876] | 4001 | def _check_ifs(self): |
---|
[2349] | 4002 | # return len(set([self.nchan(i) for i in self.getifnos()])) == 1 |
---|
[1986] | 4003 | nchans = [self.nchan(i) for i in self.getifnos()] |
---|
[2004] | 4004 | nchans = filter(lambda t: t > 0, nchans) |
---|
[876] | 4005 | return (sum(nchans)/len(nchans) == nchans[0]) |
---|
[976] | 4006 | |
---|
[1862] | 4007 | @asaplog_post_dec |
---|
[1916] | 4008 | def _fill(self, names, unit, average, opts={}): |
---|
[976] | 4009 | first = True |
---|
| 4010 | fullnames = [] |
---|
| 4011 | for name in names: |
---|
| 4012 | name = os.path.expandvars(name) |
---|
| 4013 | name = os.path.expanduser(name) |
---|
| 4014 | if not os.path.exists(name): |
---|
| 4015 | msg = "File '%s' does not exists" % (name) |
---|
| 4016 | raise IOError(msg) |
---|
| 4017 | fullnames.append(name) |
---|
| 4018 | if average: |
---|
| 4019 | asaplog.push('Auto averaging integrations') |
---|
[1079] | 4020 | stype = int(rcParams['scantable.storage'].lower() == 'disk') |
---|
[976] | 4021 | for name in fullnames: |
---|
[1073] | 4022 | tbl = Scantable(stype) |
---|
[2004] | 4023 | if is_ms( name ): |
---|
| 4024 | r = msfiller( tbl ) |
---|
| 4025 | else: |
---|
| 4026 | r = filler( tbl ) |
---|
[976] | 4027 | msg = "Importing %s..." % (name) |
---|
[1118] | 4028 | asaplog.push(msg, False) |
---|
[2349] | 4029 | r.open(name, opts) |
---|
[2480] | 4030 | rx = rcParams['scantable.reference'] |
---|
| 4031 | r.setreferenceexpr(rx) |
---|
[1843] | 4032 | r.fill() |
---|
[976] | 4033 | if average: |
---|
[1118] | 4034 | tbl = self._math._average((tbl, ), (), 'NONE', 'SCAN') |
---|
[976] | 4035 | if not first: |
---|
| 4036 | tbl = self._math._merge([self, tbl]) |
---|
| 4037 | Scantable.__init__(self, tbl) |
---|
[1843] | 4038 | r.close() |
---|
[1118] | 4039 | del r, tbl |
---|
[976] | 4040 | first = False |
---|
[1861] | 4041 | #flush log |
---|
| 4042 | asaplog.post() |
---|
[976] | 4043 | if unit is not None: |
---|
| 4044 | self.set_fluxunit(unit) |
---|
[1824] | 4045 | if not is_casapy(): |
---|
| 4046 | self.set_freqframe(rcParams['scantable.freqframe']) |
---|
[976] | 4047 | |
---|
[2610] | 4048 | def _get_verify_action( self, msg, action=None ): |
---|
| 4049 | valid_act = ['Y', 'N', 'A', 'R'] |
---|
| 4050 | if not action or not isinstance(action, str): |
---|
| 4051 | action = raw_input("%s [Y/n/a/r] (h for help): " % msg) |
---|
| 4052 | if action == '': |
---|
| 4053 | return "Y" |
---|
| 4054 | elif (action.upper()[0] in valid_act): |
---|
| 4055 | return action.upper()[0] |
---|
| 4056 | elif (action.upper()[0] in ['H','?']): |
---|
| 4057 | print "Available actions of verification [Y|n|a|r]" |
---|
| 4058 | print " Y : Yes for current data (default)" |
---|
| 4059 | print " N : No for current data" |
---|
| 4060 | print " A : Accept all in the following and exit from verification" |
---|
| 4061 | print " R : Reject all in the following and exit from verification" |
---|
| 4062 | print " H or ?: help (show this message)" |
---|
| 4063 | return self._get_verify_action(msg) |
---|
| 4064 | else: |
---|
| 4065 | return 'Y' |
---|
[2012] | 4066 | |
---|
[1402] | 4067 | def __getitem__(self, key): |
---|
| 4068 | if key < 0: |
---|
| 4069 | key += self.nrow() |
---|
| 4070 | if key >= self.nrow(): |
---|
| 4071 | raise IndexError("Row index out of range.") |
---|
| 4072 | return self._getspectrum(key) |
---|
| 4073 | |
---|
| 4074 | def __setitem__(self, key, value): |
---|
| 4075 | if key < 0: |
---|
| 4076 | key += self.nrow() |
---|
| 4077 | if key >= self.nrow(): |
---|
| 4078 | raise IndexError("Row index out of range.") |
---|
| 4079 | if not hasattr(value, "__len__") or \ |
---|
| 4080 | len(value) > self.nchan(self.getif(key)): |
---|
| 4081 | raise ValueError("Spectrum length doesn't match.") |
---|
| 4082 | return self._setspectrum(value, key) |
---|
| 4083 | |
---|
| 4084 | def __len__(self): |
---|
| 4085 | return self.nrow() |
---|
| 4086 | |
---|
| 4087 | def __iter__(self): |
---|
| 4088 | for i in range(len(self)): |
---|
| 4089 | yield self[i] |
---|