source: trunk/python/__init__.py@ 1172

Last change on this file since 1172 was 1171, checked in by mar637, 18 years ago

re-introduced custom ASAPDAT environment variable. Some more commands().

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  • Property svn:keywords set to Author Date Id Revision
File size: 21.7 KB
RevLine 
[100]1"""
2This is the ATNF Single Dish Analysis package.
3
4"""
[1080]5import os,sys,shutil, platform
[226]6
[1080]7# Set up AIPSPATH and first time use of asap i.e. ~/.asap/*
8plf = None
9if sys.platform == "linux2":
10 if platform.architecture()[0] == '64bit':
11 plf = 'linux_64b'
12 else:
13 plf = 'linux_gnu'
14elif sys.platform == 'darwin':
15 plf = 'darwin'
16else:
17 # Shouldn't happen - default to linux
18 plf = 'linux'
19asapdata = __path__[-1]
[1171]20# Allow user defined data location
21if os.environ.has_key("ASAPDATA"):
22 if os.path.exists(os.environ["ASAPDATA"]):
23 asapdata = os.environ["ASAPDATA"]
[1080]24os.environ["AIPSPATH"] = "%s %s somwhere" % ( asapdata, plf)
[1171]25# set up user space
[1080]26userdir = os.environ["HOME"]+"/.asap"
27if not os.path.exists(userdir):
28 print 'First time ASAP use. Setting up ~/.asap'
29 os.mkdir(userdir)
30 shutil.copyfile(asapdata+"/data/ipythonrc-asap", userdir+"/ipythonrc-asap")
31 f = file(userdir+"/asapuserfuncs.py", "w")
32 f.close()
33 f = file(userdir+"/ipythonrc", "w")
34 f.close()
[1171]35# remove from namespace
[1080]36del asapdata, userdir, shutil, platform
37
[513]38def _validate_bool(b):
[226]39 'Convert b to a boolean or raise'
40 bl = b.lower()
41 if bl in ('f', 'no', 'false', '0', 0): return False
42 elif bl in ('t', 'yes', 'true', '1', 1): return True
43 else:
44 raise ValueError('Could not convert "%s" to boolean' % b)
45
[513]46def _validate_int(s):
[226]47 'convert s to int or raise'
48 try: return int(s)
49 except ValueError:
50 raise ValueError('Could not convert "%s" to int' % s)
51
[513]52def _asap_fname():
[226]53 """
54 Return the path to the rc file
55
56 Search order:
57
58 * current working dir
59 * environ var ASAPRC
[274]60 * HOME/.asaprc
[706]61
[226]62 """
63
64 fname = os.path.join( os.getcwd(), '.asaprc')
65 if os.path.exists(fname): return fname
66
67 if os.environ.has_key('ASAPRC'):
68 path = os.environ['ASAPRC']
69 if os.path.exists(path):
70 fname = os.path.join(path, '.asaprc')
71 if os.path.exists(fname):
72 return fname
73
74 if os.environ.has_key('HOME'):
75 home = os.environ['HOME']
76 fname = os.path.join(home, '.asaprc')
77 if os.path.exists(fname):
78 return fname
79 return None
80
[706]81
[226]82defaultParams = {
83 # general
[513]84 'verbose' : [True, _validate_bool],
85 'useplotter' : [True, _validate_bool],
[542]86 'insitu' : [True, _validate_bool],
[706]87
[226]88 # plotting
[706]89 'plotter.gui' : [True, _validate_bool],
[226]90 'plotter.stacking' : ['p', str],
91 'plotter.panelling' : ['s', str],
[700]92 'plotter.colours' : ['', str],
93 'plotter.linestyles' : ['', str],
[710]94 'plotter.decimate' : [False, _validate_bool],
95 'plotter.ganged' : [True, _validate_bool],
[1022]96 'plotter.histogram' : [False, _validate_bool],
[1097]97 'plotter.papertype' : ['A4', str],
[710]98
[226]99 # scantable
100 'scantable.save' : ['ASAP', str],
[513]101 'scantable.autoaverage' : [True, _validate_bool],
[226]102 'scantable.freqframe' : ['LSRK', str], #default frequency frame
[1076]103 'scantable.verbosesummary' : [False, _validate_bool],
104 'scantable.storage' : ['memory', str]
[226]105 # fitter
106 }
107
[255]108def list_rcparameters():
[706]109
[255]110 print """
[737]111# general
112# print verbose output
113verbose : True
[255]114
[737]115# preload a default plotter
116useplotter : True
[255]117
[737]118# apply operations on the input scantable or return new one
119insitu : True
[706]120
[737]121# plotting
[710]122
[737]123# do we want a GUI or plot to a file
124plotter.gui : True
[710]125
[737]126# default mode for colour stacking
127plotter.stacking : Pol
[255]128
[737]129# default mode for panelling
130plotter.panelling : scan
[255]131
[737]132# push panels together, to share axislabels
133plotter.ganged : True
[710]134
[737]135# decimate the number of points plotted bya afactor of
136# nchan/1024
137plotter.decimate : False
[733]138
[737]139# default colours/linestyles
140plotter.colours :
141plotter.linestyles :
[700]142
[1022]143# enable/disable histogram plotting
144plotter.histogram : False
145
[1097]146# ps paper type
147plotter.papertype : A4
148
[737]149# scantable
[1076]150
151# default storage of scantable (memory/disk)
152scantable.storage : memory
[737]153# default ouput format when saving
154scantable.save : ASAP
155# auto averaging on read
156scantable.autoaverage : True
[255]157
[737]158# default frequency frame to set when function
[1097]159# scantable.set_freqframe is called
[737]160scantable.freqframe : LSRK
[255]161
[737]162# Control the level of information printed by summary
163scantable.verbosesummary : False
[706]164
[737]165# Fitter
166"""
[706]167
[226]168def rc_params():
169 'Return the default params updated from the values in the rc file'
[706]170
[513]171 fname = _asap_fname()
[706]172
[226]173 if fname is None or not os.path.exists(fname):
174 message = 'could not find rc file; returning defaults'
175 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
176 #print message
177 return ret
[706]178
[226]179 cnt = 0
180 for line in file(fname):
181 cnt +=1
182 line = line.strip()
183 if not len(line): continue
184 if line.startswith('#'): continue
185 tup = line.split(':',1)
186 if len(tup) !=2:
187 print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
188 continue
[706]189
[226]190 key, val = tup
191 key = key.strip()
192 if not defaultParams.has_key(key):
193 print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
194 continue
[706]195
[226]196 default, converter = defaultParams[key]
197
198 ind = val.find('#')
199 if ind>=0: val = val[:ind] # ignore trailing comments
200 val = val.strip()
201 try: cval = converter(val) # try to convert to proper type or raise
[1080]202 except ValueError, msg:
[226]203 print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
204 continue
205 else:
206 # Alles Klar, update dict
207 defaultParams[key][0] = cval
208
209 # strip the conveter funcs and return
210 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
[466]211 print ('loaded rc file %s'%fname)
[226]212
213 return ret
214
215
216# this is the instance used by the asap classes
[706]217rcParams = rc_params()
[226]218
219rcParamsDefault = dict(rcParams.items()) # a copy
220
221def rc(group, **kwargs):
222 """
223 Set the current rc params. Group is the grouping for the rc, eg
[379]224 for scantable.save the group is 'scantable', for plotter.stacking, the
225 group is 'plotter', and so on. kwargs is a list of attribute
[226]226 name/value pairs, eg
227
[379]228 rc('scantable', save='SDFITS')
[226]229
230 sets the current rc params and is equivalent to
[706]231
[379]232 rcParams['scantable.save'] = 'SDFITS'
[226]233
234 Use rcdefaults to restore the default rc params after changes.
235 """
236
[379]237 aliases = {}
[706]238
[226]239 for k,v in kwargs.items():
240 name = aliases.get(k) or k
241 key = '%s.%s' % (group, name)
242 if not rcParams.has_key(key):
243 raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
[706]244
[226]245 rcParams[key] = v
246
247
248def rcdefaults():
249 """
250 Restore the default rc params - the ones that were created at
251 asap load time
252 """
253 rcParams.update(rcParamsDefault)
254
[513]255
256def _is_sequence_or_number(param, ptype=int):
257 if isinstance(param,tuple) or isinstance(param,list):
[928]258 if len(param) == 0: return True # empty list
[513]259 out = True
260 for p in param:
261 out &= isinstance(p,ptype)
262 return out
263 elif isinstance(param, ptype):
264 return True
265 return False
266
[928]267def _to_list(param, ptype=int):
268 if isinstance(param, ptype):
269 if ptype is str: return param.split()
270 else: return [param]
271 if _is_sequence_or_number(param, ptype):
272 return param
273 return None
[715]274
[944]275def unique(x):
[992]276 """
277 Return the unique values in a list
278 Parameters:
279 x: the list to reduce
280 Examples:
281 x = [1,2,3,3,4]
282 print unique(x)
283 [1,2,3,4]
284 """
[944]285 return dict([ (val, 1) for val in x]).keys()
286
[992]287def list_files(path=".",suffix="rpf"):
288 """
289 Return a list files readable by asap, such as rpf, sdfits, mbf, asap
290 Parameters:
291 path: The directory to list (default '.')
292 suffix: The file extension (default rpf)
293 Example:
294 files = list_files("data/","sdfits")
295 print files
296 ['data/2001-09-01_0332_P363.sdfits',
297 'data/2003-04-04_131152_t0002.sdfits',
298 'data/Sgr_86p262_best_SPC.sdfits']
299 """
300 import os
301 if not os.path.isdir(path):
302 return None
303 valid = "rpf sdf sdfits mbf asap".split()
304 if not suffix in valid:
305 return None
306 files = [os.path.expanduser(os.path.expandvars(path+"/"+f)) for f in os.listdir(path)]
307 return filter(lambda x: x.endswith(suffix),files)
308
[715]309# workaround for ipython, which redirects this if banner=0 in ipythonrc
310sys.stdout = sys.__stdout__
311sys.stderr = sys.__stderr__
312
313# Logging
314from asap._asap import Log as _asaplog
315global asaplog
[710]316asaplog=_asaplog()
[715]317if rcParams['verbose']:
318 asaplog.enable()
319else:
320 asaplog.disable()
321
322def print_log():
323 log = asaplog.pop()
324 if len(log) and rcParams['verbose']: print log
325 return
326
[1134]327try:
328 import numpy.core as NUM
329except ImportError:
330 try:
331 import numarray as NUM
332 except ImportError:
333 raise ImportError("You need to have numpy or numarray installed")
334
[1117]335from asapfitter import fitter
[895]336from asapreader import reader
[944]337from selector import selector
[710]338
[100]339from asapmath import *
[1080]340from scantable import scantable
[1097]341from asaplinefind import linefinder
[1134]342from linecatalog import linecatalog
[285]343
[1134]344mask_and = NUM.logical_and
345mask_or = NUM.logical_or
346mask_not = NUM.logical_not
[466]347
[928]348if rcParams['useplotter']:
[1097]349 from asapplotter import asapplotter
[928]350 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
351 plotter = asapplotter(gui)
352 del gui
[285]353
[574]354__date__ = '$Date: 2006-08-22 23:45:12 +0000 (Tue, 22 Aug 2006) $'.split()[1]
[1171]355__version__ = '2.1b'
[100]356
[706]357if rcParams['verbose']:
[1014]358 def version(): print "ASAP %s(%s)"% (__version__, __date__)
[706]359 def list_scans(t = scantable):
360 import sys, types
361 globs = sys.modules['__main__'].__dict__.iteritems()
362 print "The user created scantables are:"
363 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
364 print filter(lambda x: not x.startswith('_'), sts)
365 return
[100]366
[715]367 def commands():
368 x = """
[113]369 [The scan container]
370 scantable - a container for integrations/scans
[182]371 (can open asap/rpfits/sdfits and ms files)
[113]372 copy - returns a copy of a scan
373 get_scan - gets a specific scan out of a scantable
[984]374 (by name or number)
[1093]375 drop_scan - drops a specific scan out of a scantable
376 (by number)
[984]377 set_selection - set a new subselection of the data
378 get_selection - get the current selection object
[113]379 summary - print info about the scantable contents
[182]380 stats - get specified statistic of the spectra in
381 the scantable
382 stddev - get the standard deviation of the spectra
383 in the scantable
[113]384 get_tsys - get the TSys
385 get_time - get the timestamps of the integrations
[733]386 get_sourcename - get the source names of the scans
[794]387 get_azimuth - get the azimuth of the scans
388 get_elevation - get the elevation of the scans
389 get_parangle - get the parallactic angle of the scans
[876]390 get_unit - get the current unit
[513]391 set_unit - set the abcissa unit to be used from this
392 point on
[255]393 get_abcissa - get the abcissa values and name for a given
394 row (time)
[113]395 set_freqframe - set the frame info for the Spectral Axis
396 (e.g. 'LSRK')
[276]397 set_doppler - set the doppler to be used from this point on
[984]398 set_dirframe - set the frame for the direction on the sky
[240]399 set_instrument - set the instrument name
[255]400 get_fluxunit - get the brightness flux unit
[240]401 set_fluxunit - set the brightness flux unit
[188]402 create_mask - return an mask in the current unit
403 for the given region. The specified regions
404 are NOT masked
[255]405 get_restfreqs - get the current list of rest frequencies
406 set_restfreqs - set a list of rest frequencies
[1012]407 flag - flag selected channels in the data
[1151]408 save - save the scantable to disk as either 'ASAP',
409 'SDFITS' or 'ASCII'
[486]410 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
[733]411 nscan - the number of scans in the scantable
[984]412 nrow - te number of spectra in the scantable
[486]413 history - print the history of the scantable
[530]414 get_fit - get a fit which has been stored witnh the data
[706]415 average_time - return the (weighted) time average of a scan
[513]416 or a list of scans
417 average_pol - average the polarisations together.
[1144]418 average_beam - average the beams together.
[992]419 convert_pol - convert to a different polarisation type
[690]420 auto_quotient - return the on/off quotient with
[1069]421 automatic detection of the on/off scans (closest
422 in time off is selected)
[1144]423 mx_quotient - Form a quotient using MX data (off beams)
[1014]424 scale, *, / - return a scan scaled by a given factor
425 add, +, - - return a scan with given value added
[513]426 bin - return a scan with binned channels
427 resample - return a scan with resampled channels
428 smooth - return the spectrally smoothed scan
429 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
[706]430 auto_poly_baseline - automatically fit a polynomial baseline
[780]431 recalc_azel - recalculate azimuth and elevation based on
432 the pointing
[513]433 gain_el - apply gain-elevation correction
434 opacity - apply opacity correction
435 convert_flux - convert to and from Jy and Kelvin brightness
[255]436 units
[513]437 freq_align - align spectra in frequency frame
[1014]438 invert_phase - Invert the phase of the cross-correlation
439 swap_linears - Swap XX and YY
[513]440 rotate_xyphase - rotate XY phase of cross correlation
441 rotate_linpolphase - rotate the phase of the complex
442 polarization O=Q+iU correlation
[733]443 freq_switch - perform frequency switching on the data
444 stats - Determine the specified statistic, e.g. 'min'
445 'max', 'rms' etc.
446 stddev - Determine the standard deviation of the current
447 beam/if/pol
[1014]448 [Selection]
449 selector - a selection object to set a subset of a scantable
450 set_scans - set (a list of) scans by index
451 set_cycles - set (a list of) cycles by index
452 set_beams - set (a list of) beamss by index
453 set_ifs - set (a list of) ifs by index
454 set_polarisations - set (a list of) polarisations by name
455 or by index
456 set_names - set a selection by name (wildcards allowed)
457 set_tsys - set a selection by tsys thresholds
458 reset - unset all selections
459 + - merge to selections
[733]460
[513]461 [Math] Mainly functions which operate on more than one scantable
[100]462
[706]463 average_time - return the (weighted) time average
[513]464 of a list of scans
465 quotient - return the on/off quotient
466 simple_math - simple mathematical operations on two scantables,
467 'add', 'sub', 'mul', 'div'
[1069]468 quotient - build quotient of the given on and off scans
469 (matched pairs and 1 off/n on are valid)
[1117]470 merge - merge a list of scantables
[1069]471
[1151]472 [Line Catalog]
473 linecatalog - a linecatalog wrapper, taking an ASCII or
474 internal format table
475 summary - print a summary of the current selection
476 set_name - select a subset by name pattern, e.g. '*OH*'
477 set_strength_limits - select a subset by line strength limits
478 set_frequency_limits - select a subset by frequency limits
479 reset - unset all selections
480 save - save the current subset to a table (internal
481 format)
482 get_row - get the name and frequency from a specific
483 row in the table
[513]484 [Fitting]
[113]485 fitter
486 auto_fit - return a scan where the function is
487 applied to all Beams/IFs/Pols.
488 commit - return a new scan where the fits have been
489 commited.
490 fit - execute the actual fitting process
[984]491 store_fit - store the fit parameters in the data (scantable)
[113]492 get_chi2 - get the Chi^2
493 set_scan - set the scantable to be fit
494 set_function - set the fitting function
495 set_parameters - set the parameters for the function(s), and
496 set if they should be held fixed during fitting
[513]497 set_gauss_parameters - same as above but specialised for individual
498 gaussian components
[113]499 get_parameters - get the fitted parameters
[513]500 plot - plot the resulting fit and/or components and
501 residual
[210]502 [Plotter]
503 asapplotter - a plotter for asap, default plotter is
504 called 'plotter'
[984]505 plot - plot a scantable
[1151]506 plot_lines - plot a linecatalog overlay
[378]507 save - save the plot to a file ('png' ,'ps' or 'eps')
[210]508 set_mode - set the state of the plotter, i.e.
509 what is to be plotted 'colour stacked'
510 and what 'panelled'
[984]511 set_selection - only plot a selected part of the data
[733]512 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
[255]513 set_legend - specify user labels for the legend indeces
514 set_title - specify user labels for the panel indeces
[733]515 set_abcissa - specify a user label for the abcissa
[255]516 set_ordinate - specify a user label for the ordinate
[378]517 set_layout - specify the multi-panel layout (rows,cols)
[733]518 set_colors - specify a set of colours to use
519 set_linestyles - specify a set of linestyles to use if only
520 using one color
[1151]521 set_font - set general font properties, e.g. 'family'
[1054]522 set_histogram - plot in historam style
[733]523 set_mask - set a plotting mask for a specific polarization
[1171]524 text - draw text annotations either in data or relative
525 coordinates
526 arrow - draw arrow annotations either in data or relative
527 coordinates
528 axhline,axvline - draw horizontal/vertical lines
529 axhspan,axvspan - draw horizontal/vertical regions
530
[182]531 [Reading files]
532 reader - access rpfits/sdfits files
[984]533 open - attach reader to a file
534 close - detach reader from file
[182]535 read - read in integrations
536 summary - list info about all integrations
537
[113]538 [General]
539 commands - this command
540 print - print details about a variable
541 list_scans - list all scantables created bt the user
[992]542 list_files - list all files readable by asap (default rpf)
[113]543 del - delete the given variable from memory
544 range - create a list of values, e.g.
545 range(3) = [0,1,2], range(2,5) = [2,3,4]
546 help - print help for one of the listed functions
547 execfile - execute an asap script, e.g. execfile('myscript')
[255]548 list_rcparameters - print out a list of possible values to be
[274]549 put into $HOME/.asaprc
[1171]550 rc - set rc parameters from within asap
[466]551 mask_and,mask_or,
552 mask_not - boolean operations on masks created with
553 scantable.create_mask
[706]554
[210]555 Note:
556 How to use this with help:
557 # function 'summary'
558 [xxx] is just a category
559 Every 'sub-level' in this list should be replaces by a '.' Period when
[706]560 using help
[210]561 Example:
562 ASAP> help scantable # to get info on ths scantable
563 ASAP> help scantable.summary # to get help on the scantable's
564 ASAP> help average_time
565
[715]566 """
[1151]567 if rcParams['verbose']:
568 try:
569 from IPython.genutils import page as pager
570 except ImportError:
571 from pydoc import pager
572 pager(x)
573 else:
574 print x
[715]575 return
[113]576
[706]577def welcome():
578 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
[100]579
[1035]580Please report any bugs via:
581http://sourcecode.atnf.csiro.au/cgi-bin/trac_asap.cgi/newticket
[100]582
[378]583[IMPORTANT: ASAP is 0-based]
[706]584Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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