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/.asaprc
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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 | 'insitu' : [True, _validate_bool],
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56 |
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57 | # plotting
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58 | 'plotter.gui' : [True, _validate_bool],
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59 | 'plotter.stacking' : ['p', str],
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60 | 'plotter.panelling' : ['s', str],
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61 | 'plotter.colours' : ['', str],
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62 | 'plotter.linestyles' : ['', str],
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63 | 'plotter.decimate' : [False, _validate_bool],
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64 | 'plotter.ganged' : [True, _validate_bool],
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65 | 'plotter.histogram' : [False, _validate_bool],
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66 |
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67 | # scantable
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68 | 'scantable.save' : ['ASAP', str],
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69 | 'scantable.autoaverage' : [True, _validate_bool],
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70 | 'scantable.freqframe' : ['LSRK', str], #default frequency frame
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71 | 'scantable.verbosesummary' : [False, _validate_bool],
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72 | 'scantable.storage' : ['memory', str]
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73 | # fitter
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74 | }
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75 |
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76 | def list_rcparameters():
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77 |
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78 | print """
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79 | # general
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80 | # print verbose output
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81 | verbose : True
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82 |
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83 | # preload a default plotter
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84 | useplotter : True
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85 |
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86 | # apply operations on the input scantable or return new one
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87 | insitu : True
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88 |
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89 | # plotting
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90 |
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91 | # do we want a GUI or plot to a file
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92 | plotter.gui : True
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93 |
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94 | # default mode for colour stacking
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95 | plotter.stacking : Pol
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96 |
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97 | # default mode for panelling
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98 | plotter.panelling : scan
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99 |
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100 | # push panels together, to share axislabels
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101 | plotter.ganged : True
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102 |
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103 | # decimate the number of points plotted bya afactor of
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104 | # nchan/1024
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105 | plotter.decimate : False
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106 |
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107 | # default colours/linestyles
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108 | plotter.colours :
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109 | plotter.linestyles :
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110 |
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111 | # enable/disable histogram plotting
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112 | plotter.histogram : False
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113 |
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114 | # scantable
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115 |
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116 | # default storage of scantable (memory/disk)
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117 | scantable.storage : memory
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118 | # default ouput format when saving
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119 | scantable.save : ASAP
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120 | # auto averaging on read
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121 | scantable.autoaverage : True
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122 |
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123 | # default frequency frame to set when function
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124 | # scantable.set_freqfrmae is called
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125 | scantable.freqframe : LSRK
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126 |
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127 | # Control the level of information printed by summary
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128 | scantable.verbosesummary : False
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129 |
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130 | # Fitter
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131 | """
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132 |
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133 | def rc_params():
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134 | 'Return the default params updated from the values in the rc file'
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135 |
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136 | fname = _asap_fname()
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137 |
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138 | if fname is None or not os.path.exists(fname):
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139 | message = 'could not find rc file; returning defaults'
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140 | ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
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141 | #print message
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142 | return ret
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143 |
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144 | cnt = 0
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145 | for line in file(fname):
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146 | cnt +=1
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147 | line = line.strip()
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148 | if not len(line): continue
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149 | if line.startswith('#'): continue
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150 | tup = line.split(':',1)
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151 | if len(tup) !=2:
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152 | print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
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153 | continue
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154 |
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155 | key, val = tup
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156 | key = key.strip()
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157 | if not defaultParams.has_key(key):
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158 | print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
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159 | continue
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160 |
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161 | default, converter = defaultParams[key]
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162 |
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163 | ind = val.find('#')
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164 | if ind>=0: val = val[:ind] # ignore trailing comments
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165 | val = val.strip()
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166 | try: cval = converter(val) # try to convert to proper type or raise
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167 | except Exception, msg:
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168 | 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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169 | continue
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170 | else:
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171 | # Alles Klar, update dict
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172 | defaultParams[key][0] = cval
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173 |
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174 | # strip the conveter funcs and return
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175 | ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
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176 | print ('loaded rc file %s'%fname)
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177 |
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178 | return ret
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179 |
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180 |
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181 | # this is the instance used by the asap classes
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182 | rcParams = rc_params()
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183 |
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184 | rcParamsDefault = dict(rcParams.items()) # a copy
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185 |
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186 | def rc(group, **kwargs):
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187 | """
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188 | Set the current rc params. Group is the grouping for the rc, eg
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189 | for scantable.save the group is 'scantable', for plotter.stacking, the
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190 | group is 'plotter', and so on. kwargs is a list of attribute
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191 | name/value pairs, eg
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192 |
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193 | rc('scantable', save='SDFITS')
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194 |
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195 | sets the current rc params and is equivalent to
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196 |
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197 | rcParams['scantable.save'] = 'SDFITS'
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198 |
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199 | Use rcdefaults to restore the default rc params after changes.
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200 | """
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201 |
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202 | aliases = {}
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203 |
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204 | for k,v in kwargs.items():
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205 | name = aliases.get(k) or k
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206 | key = '%s.%s' % (group, name)
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207 | if not rcParams.has_key(key):
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208 | raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
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209 |
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210 | rcParams[key] = v
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211 |
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212 |
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213 | def rcdefaults():
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214 | """
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215 | Restore the default rc params - the ones that were created at
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216 | asap load time
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217 | """
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218 | rcParams.update(rcParamsDefault)
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219 |
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220 |
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221 | def _is_sequence_or_number(param, ptype=int):
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222 | if isinstance(param,tuple) or isinstance(param,list):
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223 | if len(param) == 0: return True # empty list
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224 | out = True
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225 | for p in param:
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226 | out &= isinstance(p,ptype)
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227 | return out
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228 | elif isinstance(param, ptype):
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229 | return True
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230 | return False
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231 |
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232 | def _to_list(param, ptype=int):
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233 | if isinstance(param, ptype):
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234 | if ptype is str: return param.split()
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235 | else: return [param]
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236 | if _is_sequence_or_number(param, ptype):
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237 | return param
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238 | return None
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239 |
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240 | def unique(x):
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241 | """
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242 | Return the unique values in a list
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243 | Parameters:
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244 | x: the list to reduce
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245 | Examples:
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246 | x = [1,2,3,3,4]
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247 | print unique(x)
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248 | [1,2,3,4]
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249 | """
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250 | return dict([ (val, 1) for val in x]).keys()
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251 |
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252 | def list_files(path=".",suffix="rpf"):
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253 | """
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254 | Return a list files readable by asap, such as rpf, sdfits, mbf, asap
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255 | Parameters:
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256 | path: The directory to list (default '.')
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257 | suffix: The file extension (default rpf)
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258 | Example:
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259 | files = list_files("data/","sdfits")
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260 | print files
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261 | ['data/2001-09-01_0332_P363.sdfits',
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262 | 'data/2003-04-04_131152_t0002.sdfits',
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263 | 'data/Sgr_86p262_best_SPC.sdfits']
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264 | """
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265 | import os
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266 | if not os.path.isdir(path):
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267 | return None
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268 | valid = "rpf sdf sdfits mbf asap".split()
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269 | if not suffix in valid:
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270 | return None
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271 | files = [os.path.expanduser(os.path.expandvars(path+"/"+f)) for f in os.listdir(path)]
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272 | return filter(lambda x: x.endswith(suffix),files)
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273 |
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274 | # workaround for ipython, which redirects this if banner=0 in ipythonrc
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275 | sys.stdout = sys.__stdout__
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276 | sys.stderr = sys.__stderr__
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277 |
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278 | # Logging
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279 | from asap._asap import Log as _asaplog
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280 | global asaplog
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281 | asaplog=_asaplog()
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282 | if rcParams['verbose']:
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283 | asaplog.enable()
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284 | else:
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285 | asaplog.disable()
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286 |
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287 | def print_log():
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288 | log = asaplog.pop()
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289 | if len(log) and rcParams['verbose']: print log
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290 | return
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291 |
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292 | from asapfitter import *
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293 | from asapreader import reader
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294 | from selector import selector
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295 |
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296 | from asapmath import *
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297 | from scantable import *
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298 | from asaplinefind import *
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299 | #from asapfit import *
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300 |
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301 | from numarray import logical_and as mask_and
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302 | from numarray import logical_or as mask_or
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303 | from numarray import logical_not as mask_not
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304 |
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305 | if rcParams['useplotter']:
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306 | from asapplotter import *
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307 | gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
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308 | plotter = asapplotter(gui)
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309 | del gui
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310 |
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311 |
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312 | __date__ = '$Date: 2006-07-06 01:25:34 +0000 (Thu, 06 Jul 2006) $'.split()[1]
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313 | __version__ = '2.1a'
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314 |
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315 | if rcParams['verbose']:
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316 | def version(): print "ASAP %s(%s)"% (__version__, __date__)
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317 | def list_scans(t = scantable):
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318 | import sys, types
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319 | globs = sys.modules['__main__'].__dict__.iteritems()
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320 | print "The user created scantables are:"
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321 | sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
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322 | print filter(lambda x: not x.startswith('_'), sts)
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323 | return
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324 |
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325 | def commands():
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326 | x = """
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327 | [The scan container]
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328 | scantable - a container for integrations/scans
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329 | (can open asap/rpfits/sdfits and ms files)
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330 | copy - returns a copy of a scan
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331 | get_scan - gets a specific scan out of a scantable
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332 | (by name or number)
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333 | set_selection - set a new subselection of the data
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334 | get_selection - get the current selection object
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335 | summary - print info about the scantable contents
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336 | stats - get specified statistic of the spectra in
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337 | the scantable
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338 | stddev - get the standard deviation of the spectra
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339 | in the scantable
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340 | get_tsys - get the TSys
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341 | get_time - get the timestamps of the integrations
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342 | get_sourcename - get the source names of the scans
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343 | get_azimuth - get the azimuth of the scans
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344 | get_elevation - get the elevation of the scans
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345 | get_parangle - get the parallactic angle of the scans
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346 | get_unit - get the current unit
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347 | set_unit - set the abcissa unit to be used from this
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348 | point on
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349 | get_abcissa - get the abcissa values and name for a given
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350 | row (time)
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351 | set_freqframe - set the frame info for the Spectral Axis
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352 | (e.g. 'LSRK')
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353 | set_doppler - set the doppler to be used from this point on
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354 | set_dirframe - set the frame for the direction on the sky
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355 | set_instrument - set the instrument name
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356 | get_fluxunit - get the brightness flux unit
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357 | set_fluxunit - set the brightness flux unit
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358 | create_mask - return an mask in the current unit
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359 | for the given region. The specified regions
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360 | are NOT masked
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361 | get_restfreqs - get the current list of rest frequencies
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362 | set_restfreqs - set a list of rest frequencies
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363 | flag - flag selected channels in the data
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364 | save - save the scantable to disk as either 'ASAP'
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365 | or 'SDFITS'
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366 | nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
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367 | nscan - the number of scans in the scantable
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368 | nrow - te number of spectra in the scantable
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369 | history - print the history of the scantable
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370 | get_fit - get a fit which has been stored witnh the data
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371 | average_time - return the (weighted) time average of a scan
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372 | or a list of scans
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373 | average_channel - return the (median) average of a scantable
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374 | average_pol - average the polarisations together.
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375 | The dimension won't be reduced and
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376 | all polarisations will contain the
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377 | averaged spectrum.
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378 | convert_pol - convert to a different polarisation type
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379 | auto_quotient - return the on/off quotient with
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380 | automatic detection of the on/off scans (closest
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381 | in time off is selected)
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382 | scale, *, / - return a scan scaled by a given factor
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383 | add, +, - - return a scan with given value added
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384 | bin - return a scan with binned channels
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385 | resample - return a scan with resampled channels
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386 | smooth - return the spectrally smoothed scan
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387 | poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
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388 | auto_poly_baseline - automatically fit a polynomial baseline
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389 | recalc_azel - recalculate azimuth and elevation based on
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390 | the pointing
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391 | gain_el - apply gain-elevation correction
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392 | opacity - apply opacity correction
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393 | convert_flux - convert to and from Jy and Kelvin brightness
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394 | units
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395 | freq_align - align spectra in frequency frame
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396 | invert_phase - Invert the phase of the cross-correlation
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397 | swap_linears - Swap XX and YY
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398 | rotate_xyphase - rotate XY phase of cross correlation
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399 | rotate_linpolphase - rotate the phase of the complex
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400 | polarization O=Q+iU correlation
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401 | freq_switch - perform frequency switching on the data
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402 | stats - Determine the specified statistic, e.g. 'min'
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403 | 'max', 'rms' etc.
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404 | stddev - Determine the standard deviation of the current
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405 | beam/if/pol
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406 | [Selection]
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407 | selector - a selection object to set a subset of a scantable
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408 | set_scans - set (a list of) scans by index
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409 | set_cycles - set (a list of) cycles by index
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410 | set_beams - set (a list of) beamss by index
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411 | set_ifs - set (a list of) ifs by index
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412 | set_polarisations - set (a list of) polarisations by name
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413 | or by index
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414 | set_names - set a selection by name (wildcards allowed)
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415 | set_tsys - set a selection by tsys thresholds
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416 | reset - unset all selections
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417 | + - merge to selections
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418 |
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419 | [Math] Mainly functions which operate on more than one scantable
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420 |
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421 | average_time - return the (weighted) time average
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422 | of a list of scans
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423 | quotient - return the on/off quotient
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424 | simple_math - simple mathematical operations on two scantables,
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425 | 'add', 'sub', 'mul', 'div'
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426 | quotient - build quotient of the given on and off scans
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427 | (matched pairs and 1 off/n on are valid)
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428 |
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429 | [Fitting]
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430 | fitter
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431 | auto_fit - return a scan where the function is
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432 | applied to all Beams/IFs/Pols.
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433 | commit - return a new scan where the fits have been
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434 | commited.
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435 | fit - execute the actual fitting process
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436 | store_fit - store the fit parameters in the data (scantable)
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437 | get_chi2 - get the Chi^2
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438 | set_scan - set the scantable to be fit
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439 | set_function - set the fitting function
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440 | set_parameters - set the parameters for the function(s), and
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441 | set if they should be held fixed during fitting
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442 | set_gauss_parameters - same as above but specialised for individual
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443 | gaussian components
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444 | get_parameters - get the fitted parameters
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445 | plot - plot the resulting fit and/or components and
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446 | residual
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447 | [Plotter]
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448 | asapplotter - a plotter for asap, default plotter is
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449 | called 'plotter'
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450 | plot - plot a scantable
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451 | save - save the plot to a file ('png' ,'ps' or 'eps')
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452 | set_mode - set the state of the plotter, i.e.
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453 | what is to be plotted 'colour stacked'
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454 | and what 'panelled'
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455 | set_selection - only plot a selected part of the data
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456 | set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
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457 | set_legend - specify user labels for the legend indeces
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458 | set_title - specify user labels for the panel indeces
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459 | set_abcissa - specify a user label for the abcissa
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460 | set_ordinate - specify a user label for the ordinate
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461 | set_layout - specify the multi-panel layout (rows,cols)
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462 | set_colors - specify a set of colours to use
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463 | set_linestyles - specify a set of linestyles to use if only
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464 | using one color
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465 | set_histogram - plot in historam style
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466 | set_mask - set a plotting mask for a specific polarization
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467 |
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468 | [Reading files]
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469 | reader - access rpfits/sdfits files
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470 | open - attach reader to a file
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471 | close - detach reader from file
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472 | read - read in integrations
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473 | summary - list info about all integrations
|
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474 |
|
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475 | [General]
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476 | commands - this command
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477 | print - print details about a variable
|
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478 | list_scans - list all scantables created bt the user
|
---|
479 | list_files - list all files readable by asap (default rpf)
|
---|
480 | del - delete the given variable from memory
|
---|
481 | range - create a list of values, e.g.
|
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482 | range(3) = [0,1,2], range(2,5) = [2,3,4]
|
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483 | help - print help for one of the listed functions
|
---|
484 | execfile - execute an asap script, e.g. execfile('myscript')
|
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485 | list_rcparameters - print out a list of possible values to be
|
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486 | put into $HOME/.asaprc
|
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487 | mask_and,mask_or,
|
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488 | mask_not - boolean operations on masks created with
|
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489 | scantable.create_mask
|
---|
490 |
|
---|
491 | Note:
|
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492 | How to use this with help:
|
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493 | # function 'summary'
|
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494 | [xxx] is just a category
|
---|
495 | Every 'sub-level' in this list should be replaces by a '.' Period when
|
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496 | using help
|
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497 | Example:
|
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498 | ASAP> help scantable # to get info on ths scantable
|
---|
499 | ASAP> help scantable.summary # to get help on the scantable's
|
---|
500 | ASAP> help average_time
|
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501 |
|
---|
502 | """
|
---|
503 | print x
|
---|
504 | return
|
---|
505 |
|
---|
506 | def welcome():
|
---|
507 | return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
|
---|
508 |
|
---|
509 | Please report any bugs via:
|
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510 | http://sourcecode.atnf.csiro.au/cgi-bin/trac_asap.cgi/newticket
|
---|
511 |
|
---|
512 | [IMPORTANT: ASAP is 0-based]
|
---|
513 | Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
|
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