1 | """
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2 | This is the ATNF Single Dish Analysis package.
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3 |
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4 | """
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5 | import os,sys
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6 |
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7 | def validate_bool(b):
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8 | 'Convert b to a boolean or raise'
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9 | bl = b.lower()
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10 | if bl in ('f', 'no', 'false', '0', 0): return False
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11 | elif bl in ('t', 'yes', 'true', '1', 1): return True
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12 | else:
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13 | raise ValueError('Could not convert "%s" to boolean' % b)
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14 |
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15 | def validate_int(s):
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16 | 'convert s to int or raise'
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17 | try: return int(s)
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18 | except ValueError:
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19 | raise ValueError('Could not convert "%s" to int' % s)
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20 |
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21 | def asap_fname():
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22 | """
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23 | Return the path to the rc file
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24 |
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25 | Search order:
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26 |
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27 | * current working dir
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28 | * environ var ASAPRC
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29 | * HOME/.matplotlibrc
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30 |
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31 | """
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32 |
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33 | fname = os.path.join( os.getcwd(), '.asaprc')
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34 | if os.path.exists(fname): return fname
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35 |
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36 | if os.environ.has_key('ASAPRC'):
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37 | path = os.environ['ASAPRC']
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38 | if os.path.exists(path):
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39 | fname = os.path.join(path, '.asaprc')
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40 | if os.path.exists(fname):
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41 | return fname
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42 |
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43 | if os.environ.has_key('HOME'):
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44 | home = os.environ['HOME']
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45 | fname = os.path.join(home, '.asaprc')
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46 | if os.path.exists(fname):
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47 | return fname
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48 | return None
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49 |
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50 |
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51 | defaultParams = {
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52 | # general
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53 | 'verbose' : [True, validate_bool],
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54 | 'useplotter' : [True, validate_bool],
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55 |
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56 | # plotting
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57 | 'plotter.stacking' : ['p', str],
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58 | 'plotter.panelling' : ['s', str],
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59 |
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60 | # scantable
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61 | 'scantable.save' : ['ASAP', str],
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62 | 'scantable.autoaverage' : [True, validate_bool],
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63 | 'scantable.freqframe' : ['LSRK', str], #default frequency frame
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64 | 'scantable.allaxes' : [True, validate_bool], # apply action to all axes
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65 | 'scantable.plotter' : [True, validate_bool], # use internal plotter
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66 |
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67 | # math
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68 | 'math.insitu' : [False, validate_bool],
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69 |
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70 | # fitter
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71 | 'fitter.polyorder' : [0, validate_int],
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72 | 'fitter.ncomponents' : [1, validate_int]
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73 | }
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74 |
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75 | def rc_params():
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76 | 'Return the default params updated from the values in the rc file'
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77 |
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78 | fname = asap_fname()
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79 |
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80 | if fname is None or not os.path.exists(fname):
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81 | message = 'could not find rc file; returning defaults'
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82 | ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
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83 | #print message
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84 | return ret
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85 |
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86 | cnt = 0
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87 | for line in file(fname):
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88 | cnt +=1
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89 | line = line.strip()
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90 | if not len(line): continue
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91 | if line.startswith('#'): continue
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92 | tup = line.split(':',1)
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93 | if len(tup) !=2:
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94 | print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
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95 | continue
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96 |
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97 | key, val = tup
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98 | key = key.strip()
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99 | if not defaultParams.has_key(key):
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100 | print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
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101 | continue
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102 |
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103 | default, converter = defaultParams[key]
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104 |
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105 | ind = val.find('#')
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106 | if ind>=0: val = val[:ind] # ignore trailing comments
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107 | val = val.strip()
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108 | try: cval = converter(val) # try to convert to proper type or raise
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109 | except Exception, msg:
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110 | print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
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111 | continue
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112 | else:
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113 | # Alles Klar, update dict
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114 | defaultParams[key][0] = cval
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115 |
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116 | # strip the conveter funcs and return
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117 | ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
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118 | verbose.report('loaded rc file %s'%fname)
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119 |
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120 | return ret
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121 |
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122 |
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123 | # this is the instance used by the asap classes
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124 | rcParams = rc_params()
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125 |
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126 | rcParamsDefault = dict(rcParams.items()) # a copy
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127 |
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128 | def rc(group, **kwargs):
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129 | """
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130 | Set the current rc params. Group is the grouping for the rc, eg
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131 | for lines.linewidth the group is 'lines', for axes.facecolor, the
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132 | group is 'axes', and so on. kwargs is a list of attribute
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133 | name/value pairs, eg
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134 |
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135 | rc('lines', linewidth=2, color='r')
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136 |
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137 | sets the current rc params and is equivalent to
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138 |
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139 | rcParams['lines.linewidth'] = 2
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140 | rcParams['lines.color'] = 'r'
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141 |
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142 |
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143 | Note you can use python's kwargs dictionary facility to store
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144 | dictionaries of default parameters. Eg, you can customize the
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145 | font rc as follows
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146 |
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147 | font = {'family' : 'monospace',
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148 | 'weight' : 'bold',
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149 | 'size' : 'larger',
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150 | }
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151 |
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152 | rc('font', **font) # pass in the font dict as kwargs
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153 |
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154 | This enables you to easily switch between several configurations.
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155 | Use rcdefaults to restore the default rc params after changes.
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156 | """
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157 |
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158 | aliases = {
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159 | }
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160 |
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161 | for k,v in kwargs.items():
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162 | name = aliases.get(k) or k
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163 | key = '%s.%s' % (group, name)
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164 | if not rcParams.has_key(key):
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165 | raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
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166 |
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167 | rcParams[key] = v
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168 |
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169 |
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170 | def rcdefaults():
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171 | """
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172 | Restore the default rc params - the ones that were created at
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173 | asap load time
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174 | """
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175 | rcParams.update(rcParamsDefault)
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176 |
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177 | from asapfitter import *
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178 | from asapreader import reader
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179 | from asapmath import *
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180 | from scantable import *
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181 | if rcParams['useplotter']:
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182 | print "Initialising plotter..."
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183 | from asapplotter import *
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184 | plotter = asapplotter()
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185 | #from numarray ones,zeros
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186 |
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187 | __date__ = '$Date: 2005-01-21 01:28:57 +0000 (Fri, 21 Jan 2005) $'
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188 | __version__ = '0.1a'
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189 |
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190 | def list_scans(t = scantable):
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191 | import sys, types
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192 | #meta_t = type(t)
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193 | #if meta_t == types.InstanceType:
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194 | # t = t.__class__
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195 | #elif meta_t not in [types.ClassType, types.TypeType]:
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196 | # t = meta_t
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197 | globs = sys.modules['__main__'].__dict__.iteritems()
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198 | print "The user created scantables are:"
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199 | x = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
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200 | print x
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201 |
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202 | def commands():
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203 | x = """
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204 | [The scan container]
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205 | scantable - a container for integrations/scans
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206 | (can open asap/rpfits/sdfits and ms files)
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207 | copy - returns a copy of a scan
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208 | get_scan - gets a specific scan out of a scantable
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209 | summary - print info about the scantable contents
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210 | set_selection - set a specific Beam/IF/Pol for furthrt use
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211 | get_selection - print out the current selection
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212 | stats - get specified statistic of the spectra in
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213 | the scantable
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214 | stddev - get the standard deviation of the spectra
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215 | in the scantable
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216 | get_tsys - get the TSys
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217 | get_time - get the timestamps of the integrations
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218 | set_unit - set the units to be used from this point on
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219 | set_freqframe - set the frame info for the Spectral Axis
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220 | (e.g. 'LSRK')
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221 | set_instrument - set the instrument name
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222 | set_fluxunit - set the brightness flux unit
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223 | create_mask - return an mask in the current unit
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224 | for the given region. The specified regions
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225 | are NOT masked
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226 | set_restfreqs - give a list of rest frequencies
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227 | flag_spectrum - flag a whole Beam/IF/Pol
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228 | save - save the scantable to disk as either 'ASAP'
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229 | or 'SDFITS'
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230 | nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
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231 | [Math]
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232 | average_time - return the (weighted) time average of a scan
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233 | or a list of scans
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234 | average_pol - average the polarisations together.
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235 | The dimension won't be reduced and
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236 | all polarisations will contain the
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237 | averaged spectrum.
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238 | quotient - return the on/off quotient
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239 | b_operate - simple mathematical operations on two scan tables
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240 | scale - returns a scan scaled by a given factor
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241 | add - returns a scan with given value added
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242 | bin - return a scan with binned channels
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243 | smooth - return the spectrally smoothed scan
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244 | poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
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245 | gain_el - apply gain-elevation correction
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246 | opacity - apply opacity correction
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247 | convert_flux - convert to and from Jy and Kelvin brightness units
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248 |
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249 | fitter
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250 | auto_fit - return a scan where the function is
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251 | applied to all Beams/IFs/Pols.
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252 | commit - return a new scan where the fits have been
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253 | commited.
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254 | fit - execute the actual fitting process
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255 | get_chi2 - get the Chi^2
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256 | set_scan - set the scantable to be fit
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257 | set_function - set the fitting function
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258 | set_parameters - set the parameters for the function(s), and
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259 | set if they should be held fixed during fitting
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260 | get_parameters - get the fitted parameters
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261 | [Plotter]
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262 | asapplotter - a plotter for asap, default plotter is
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263 | called 'plotter'
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264 | plot - plot a (list of) scantable
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265 | set_mode - set the state of the plotter, i.e.
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266 | what is to be plotted 'colour stacked'
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267 | and what 'panelled'
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268 | set_range - set the abcissa 'zoom' range
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269 | set_legend_map - specify user labels for the legend indeces
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270 |
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271 | [Reading files]
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272 | reader - access rpfits/sdfits files
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273 | read - read in integrations
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274 | summary - list info about all integrations
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275 |
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276 | [General]
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277 | commands - this command
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278 | print - print details about a variable
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279 | list_scans - list all scantables created bt the user
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280 | del - delete the given variable from memory
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281 | range - create a list of values, e.g.
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282 | range(3) = [0,1,2], range(2,5) = [2,3,4]
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283 | help - print help for one of the listed functions
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284 | execfile - execute an asap script, e.g. execfile('myscript')
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285 | Note:
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286 | How to use this with help:
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287 | # function 'summary'
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288 | [xxx] is just a category
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289 | Every 'sub-level' in this list should be replaces by a '.' Period when
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290 | using help
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291 | Example:
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292 | ASAP> help scantable # to get info on ths scantable
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293 | ASAP> help scantable.summary # to get help on the scantable's
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294 | ASAP> help average_time
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295 |
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296 | """
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297 | print x
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298 | return
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299 |
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300 | print """Welcome to ASAP - the ATNF Single Dish Analysis Package
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301 | This is a testing pre-release v0.1a
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302 |
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303 | Please report any bugs to:
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304 | Malte.Marquarding@csiro.au
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305 |
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306 | [NOTE: ASAP is 0-based]
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307 | Type commands() to get a list of all available ASAP commands.
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308 | """
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