source: branches/Release12/python/__init__.py@ 1890

Last change on this file since 1890 was 800, checked in by mar637, 19 years ago

Request: added channel based flagging

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[100]1"""
2This is the ATNF Single Dish Analysis package.
3
4"""
[226]5import os,sys
6
[513]7def _validate_bool(b):
[226]8 'Convert b to a boolean or raise'
9 bl = b.lower()
10 if bl in ('f', 'no', 'false', '0', 0): return False
11 elif bl in ('t', 'yes', 'true', '1', 1): return True
12 else:
13 raise ValueError('Could not convert "%s" to boolean' % b)
14
[513]15def _validate_int(s):
[226]16 'convert s to int or raise'
17 try: return int(s)
18 except ValueError:
19 raise ValueError('Could not convert "%s" to int' % s)
20
[513]21def _asap_fname():
[226]22 """
23 Return the path to the rc file
24
25 Search order:
26
27 * current working dir
28 * environ var ASAPRC
[274]29 * HOME/.asaprc
[706]30
[226]31 """
32
33 fname = os.path.join( os.getcwd(), '.asaprc')
34 if os.path.exists(fname): return fname
35
36 if os.environ.has_key('ASAPRC'):
37 path = os.environ['ASAPRC']
38 if os.path.exists(path):
39 fname = os.path.join(path, '.asaprc')
40 if os.path.exists(fname):
41 return fname
42
43 if os.environ.has_key('HOME'):
44 home = os.environ['HOME']
45 fname = os.path.join(home, '.asaprc')
46 if os.path.exists(fname):
47 return fname
48 return None
49
[706]50
[226]51defaultParams = {
52 # general
[513]53 'verbose' : [True, _validate_bool],
54 'useplotter' : [True, _validate_bool],
[542]55 'insitu' : [True, _validate_bool],
[706]56
[226]57 # plotting
[706]58 'plotter.gui' : [True, _validate_bool],
[226]59 'plotter.stacking' : ['p', str],
60 'plotter.panelling' : ['s', str],
[700]61 'plotter.colours' : ['', str],
62 'plotter.linestyles' : ['', str],
[710]63 'plotter.decimate' : [False, _validate_bool],
64 'plotter.ganged' : [True, _validate_bool],
65
[226]66 # scantable
67 'scantable.save' : ['ASAP', str],
[513]68 'scantable.autoaverage' : [True, _validate_bool],
[226]69 'scantable.freqframe' : ['LSRK', str], #default frequency frame
[513]70 'scantable.allaxes' : [True, _validate_bool], # apply action to all axes
71 'scantable.plotter' : [True, _validate_bool], # use internal plotter
72 'scantable.verbosesummary' : [False, _validate_bool]
[226]73
74 # fitter
75 }
76
[255]77def list_rcparameters():
[706]78
[255]79 print """
[737]80# general
81# print verbose output
82verbose : True
[255]83
[737]84# preload a default plotter
85useplotter : True
[255]86
[737]87# apply operations on the input scantable or return new one
88insitu : True
[706]89
[737]90# plotting
[710]91
[737]92# do we want a GUI or plot to a file
93plotter.gui : True
[710]94
[737]95# default mode for colour stacking
96plotter.stacking : Pol
[255]97
[737]98# default mode for panelling
99plotter.panelling : scan
[255]100
[737]101# push panels together, to share axislabels
102plotter.ganged : True
[710]103
[737]104# decimate the number of points plotted bya afactor of
105# nchan/1024
106plotter.decimate : False
[733]107
[737]108# default colours/linestyles
109plotter.colours :
110plotter.linestyles :
[700]111
[737]112# scantable
113# default ouput format when saving
114scantable.save : ASAP
115# auto averaging on read
116scantable.autoaverage : True
[255]117
[737]118# default frequency frame to set when function
119# scantable.set_freqfrmae is called
120scantable.freqframe : LSRK
[255]121
[737]122# apply action to all axes not just the cursor location
123scantable.allaxes : True
[255]124
[737]125# use internal plotter
126scantable.plotter : True
[255]127
[737]128# Control the level of information printed by summary
129scantable.verbosesummary : False
[706]130
[737]131# Fitter
132"""
[706]133
[226]134def rc_params():
135 'Return the default params updated from the values in the rc file'
[706]136
[513]137 fname = _asap_fname()
[706]138
[226]139 if fname is None or not os.path.exists(fname):
140 message = 'could not find rc file; returning defaults'
141 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
142 #print message
143 return ret
[706]144
[226]145 cnt = 0
146 for line in file(fname):
147 cnt +=1
148 line = line.strip()
149 if not len(line): continue
150 if line.startswith('#'): continue
151 tup = line.split(':',1)
152 if len(tup) !=2:
153 print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
154 continue
[706]155
[226]156 key, val = tup
157 key = key.strip()
158 if not defaultParams.has_key(key):
159 print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
160 continue
[706]161
[226]162 default, converter = defaultParams[key]
163
164 ind = val.find('#')
165 if ind>=0: val = val[:ind] # ignore trailing comments
166 val = val.strip()
167 try: cval = converter(val) # try to convert to proper type or raise
168 except Exception, msg:
169 print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
170 continue
171 else:
172 # Alles Klar, update dict
173 defaultParams[key][0] = cval
174
175 # strip the conveter funcs and return
176 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
[466]177 print ('loaded rc file %s'%fname)
[226]178
179 return ret
180
181
182# this is the instance used by the asap classes
[706]183rcParams = rc_params()
[226]184
185rcParamsDefault = dict(rcParams.items()) # a copy
186
187def rc(group, **kwargs):
188 """
189 Set the current rc params. Group is the grouping for the rc, eg
[379]190 for scantable.save the group is 'scantable', for plotter.stacking, the
191 group is 'plotter', and so on. kwargs is a list of attribute
[226]192 name/value pairs, eg
193
[379]194 rc('scantable', save='SDFITS')
[226]195
196 sets the current rc params and is equivalent to
[706]197
[379]198 rcParams['scantable.save'] = 'SDFITS'
[226]199
200 Use rcdefaults to restore the default rc params after changes.
201 """
202
[379]203 aliases = {}
[706]204
[226]205 for k,v in kwargs.items():
206 name = aliases.get(k) or k
207 key = '%s.%s' % (group, name)
208 if not rcParams.has_key(key):
209 raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
[706]210
[226]211 rcParams[key] = v
212
213
214def rcdefaults():
215 """
216 Restore the default rc params - the ones that were created at
217 asap load time
218 """
219 rcParams.update(rcParamsDefault)
220
[513]221
222def _is_sequence_or_number(param, ptype=int):
223 if isinstance(param,tuple) or isinstance(param,list):
224 out = True
225 for p in param:
226 out &= isinstance(p,ptype)
227 return out
228 elif isinstance(param, ptype):
229 return True
230 return False
231
[715]232
233# workaround for ipython, which redirects this if banner=0 in ipythonrc
234sys.stdout = sys.__stdout__
235sys.stderr = sys.__stderr__
236
237# Logging
238from asap._asap import Log as _asaplog
239global asaplog
[710]240asaplog=_asaplog()
[715]241if rcParams['verbose']:
242 asaplog.enable()
243else:
244 asaplog.disable()
245
246def print_log():
247 log = asaplog.pop()
248 if len(log) and rcParams['verbose']: print log
249 return
250
[113]251from asapfitter import *
[100]252from asapreader import reader
[710]253
[100]254from asapmath import *
255from scantable import *
[297]256from asaplinefind import *
[530]257from asapfit import *
[285]258
[466]259from numarray import logical_and as mask_and
260from numarray import logical_or as mask_or
261from numarray import logical_not as mask_not
262
[226]263if rcParams['useplotter']:
[706]264 from asapplotter import *
265 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
266 plotter = asapplotter(gui)
[715]267 del gui
[285]268
[574]269__date__ = '$Date: 2006-01-10 04:11:58 +0000 (Tue, 10 Jan 2006) $'.split()[1]
[800]270__version__ = '1.2.2a'
[100]271
[706]272if rcParams['verbose']:
273 def list_scans(t = scantable):
274 import sys, types
275 globs = sys.modules['__main__'].__dict__.iteritems()
276 print "The user created scantables are:"
277 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
278 print filter(lambda x: not x.startswith('_'), sts)
279 return
[100]280
[715]281 def commands():
282 x = """
[113]283 [The scan container]
284 scantable - a container for integrations/scans
[182]285 (can open asap/rpfits/sdfits and ms files)
[113]286 copy - returns a copy of a scan
287 get_scan - gets a specific scan out of a scantable
[733]288 (by name or number)
[113]289 summary - print info about the scantable contents
[255]290 set_cursor - set a specific Beam/IF/Pol 'cursor' for
291 further use
292 get_cursor - print out the current cursor position
[182]293 stats - get specified statistic of the spectra in
294 the scantable
295 stddev - get the standard deviation of the spectra
296 in the scantable
[113]297 get_tsys - get the TSys
298 get_time - get the timestamps of the integrations
[733]299 get_sourcename - get the source names of the scans
[788]300 get_azimuth - get the azimuth of the scans
[787]301 get_elevation - get the elevation of the scans
302 get_parangle - get the parallactic angle of the scans
[255]303 get_unit - get the currnt unit
[513]304 set_unit - set the abcissa unit to be used from this
305 point on
[255]306 get_abcissa - get the abcissa values and name for a given
307 row (time)
[113]308 set_freqframe - set the frame info for the Spectral Axis
309 (e.g. 'LSRK')
[276]310 set_doppler - set the doppler to be used from this point on
[240]311 set_instrument - set the instrument name
[255]312 get_fluxunit - get the brightness flux unit
[240]313 set_fluxunit - set the brightness flux unit
[188]314 create_mask - return an mask in the current unit
315 for the given region. The specified regions
316 are NOT masked
[255]317 get_restfreqs - get the current list of rest frequencies
318 set_restfreqs - set a list of rest frequencies
[403]319 lines - print list of known spectral lines
[800]320 flag_spectrum - flag spectral channels
[116]321 save - save the scantable to disk as either 'ASAP'
322 or 'SDFITS'
[486]323 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
[733]324 nscan - the number of scans in the scantable
325 nrow - te number of integrations in the scantable
[486]326 history - print the history of the scantable
[530]327 get_fit - get a fit which has been stored witnh the data
[706]328 average_time - return the (weighted) time average of a scan
[513]329 or a list of scans
330 average_pol - average the polarisations together.
[113]331 The dimension won't be reduced and
332 all polarisations will contain the
333 averaged spectrum.
[690]334 auto_quotient - return the on/off quotient with
335 automatic detection of the on/off scans
[733]336 (matched pairs and 1 off - n on)
[513]337 quotient - return the on/off quotient
338 scale - return a scan scaled by a given factor
[706]339 add - return a scan with given value added
[513]340 bin - return a scan with binned channels
341 resample - return a scan with resampled channels
342 smooth - return the spectrally smoothed scan
343 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
[706]344 auto_poly_baseline - automatically fit a polynomial baseline
[773]345 recalc_azel - recalculate azimuth and elevation based on
346 the pointing
[513]347 gain_el - apply gain-elevation correction
348 opacity - apply opacity correction
349 convert_flux - convert to and from Jy and Kelvin brightness
[255]350 units
[513]351 freq_align - align spectra in frequency frame
352 rotate_xyphase - rotate XY phase of cross correlation
353 rotate_linpolphase - rotate the phase of the complex
354 polarization O=Q+iU correlation
[798]355 invert_phase - take the complex conjugate of the cross correlation
356 swap_pol - swap the order of the parallel polarisations
[733]357 freq_switch - perform frequency switching on the data
358 stats - Determine the specified statistic, e.g. 'min'
359 'max', 'rms' etc.
360 stddev - Determine the standard deviation of the current
361 beam/if/pol
362
[513]363 [Math] Mainly functions which operate on more than one scantable
[100]364
[706]365 average_time - return the (weighted) time average
[513]366 of a list of scans
367 quotient - return the on/off quotient
368 simple_math - simple mathematical operations on two scantables,
369 'add', 'sub', 'mul', 'div'
370 [Fitting]
[113]371 fitter
372 auto_fit - return a scan where the function is
373 applied to all Beams/IFs/Pols.
374 commit - return a new scan where the fits have been
375 commited.
376 fit - execute the actual fitting process
[530]377 store_fit - store the fit paramaters in the data (scantable)
[113]378 get_chi2 - get the Chi^2
379 set_scan - set the scantable to be fit
380 set_function - set the fitting function
381 set_parameters - set the parameters for the function(s), and
382 set if they should be held fixed during fitting
[513]383 set_gauss_parameters - same as above but specialised for individual
384 gaussian components
[113]385 get_parameters - get the fitted parameters
[513]386 plot - plot the resulting fit and/or components and
387 residual
[210]388 [Plotter]
389 asapplotter - a plotter for asap, default plotter is
390 called 'plotter'
391 plot - plot a (list of) scantable
[378]392 save - save the plot to a file ('png' ,'ps' or 'eps')
[210]393 set_mode - set the state of the plotter, i.e.
394 what is to be plotted 'colour stacked'
395 and what 'panelled'
[530]396 set_cursor - only plot a selected part of the data
[733]397 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
[255]398 set_legend - specify user labels for the legend indeces
399 set_title - specify user labels for the panel indeces
[733]400 set_abcissa - specify a user label for the abcissa
[255]401 set_ordinate - specify a user label for the ordinate
[378]402 set_layout - specify the multi-panel layout (rows,cols)
[733]403 set_colors - specify a set of colours to use
404 set_linestyles - specify a set of linestyles to use if only
405 using one color
406 set_mask - set a plotting mask for a specific polarization
[706]407
[182]408 [Reading files]
409 reader - access rpfits/sdfits files
410 read - read in integrations
411 summary - list info about all integrations
412
[113]413 [General]
414 commands - this command
415 print - print details about a variable
416 list_scans - list all scantables created bt the user
417 del - delete the given variable from memory
418 range - create a list of values, e.g.
419 range(3) = [0,1,2], range(2,5) = [2,3,4]
420 help - print help for one of the listed functions
421 execfile - execute an asap script, e.g. execfile('myscript')
[255]422 list_rcparameters - print out a list of possible values to be
[274]423 put into $HOME/.asaprc
[466]424 mask_and,mask_or,
425 mask_not - boolean operations on masks created with
426 scantable.create_mask
[706]427
[210]428 Note:
429 How to use this with help:
430 # function 'summary'
431 [xxx] is just a category
432 Every 'sub-level' in this list should be replaces by a '.' Period when
[706]433 using help
[210]434 Example:
435 ASAP> help scantable # to get info on ths scantable
436 ASAP> help scantable.summary # to get help on the scantable's
437 ASAP> help average_time
438
[715]439 """
440 print x
441 return
[113]442
[706]443def welcome():
444 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
[100]445
446Please report any bugs to:
[555]447asap@atnf.csiro.au
[100]448
[378]449[IMPORTANT: ASAP is 0-based]
[706]450Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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