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