source: branches/alma/python/__init__.py@ 1453

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1"""
2This is the ATNF Single Dish Analysis package.
3
4"""
5import os,sys,shutil, platform
6
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]
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"]
24# use AIPSPATH if defined and "data" dir present
25if not os.environ.has_key("AIPSPATH") or \
26 not os.path.exists(os.environ["AIPSPATH"].split()[0]+"/data"):
27 os.environ["AIPSPATH"] = "%s %s somwhere" % ( asapdata, plf)
28# set up user space
29userdir = os.environ["HOME"]+"/.asap"
30if not os.path.exists(userdir):
31 print 'First time ASAP use. Setting up ~/.asap'
32 os.mkdir(userdir)
33 #shutil.copyfile(asapdata+"/data/ipythonrc-asap", userdir+"/ipythonrc-asap")
34 f = file(userdir+"/asapuserfuncs.py", "w")
35 f.close()
36 f = file(userdir+"/ipythonrc", "w")
37 f.close()
38# remove from namespace
39del asapdata, userdir, shutil, platform
40
41def _validate_bool(b):
42 'Convert b to a boolean or raise'
43 bl = b.lower()
44 if bl in ('f', 'no', 'false', '0', 0): return False
45 elif bl in ('t', 'yes', 'true', '1', 1): return True
46 else:
47 raise ValueError('Could not convert "%s" to boolean' % b)
48
49def _validate_int(s):
50 'convert s to int or raise'
51 try: return int(s)
52 except ValueError:
53 raise ValueError('Could not convert "%s" to int' % s)
54
55def _asap_fname():
56 """
57 Return the path to the rc file
58
59 Search order:
60
61 * current working dir
62 * environ var ASAPRC
63 * HOME/.asaprc
64
65 """
66
67 fname = os.path.join( os.getcwd(), '.asaprc')
68 if os.path.exists(fname): return fname
69
70 if os.environ.has_key('ASAPRC'):
71 path = os.environ['ASAPRC']
72 if os.path.exists(path):
73 fname = os.path.join(path, '.asaprc')
74 if os.path.exists(fname):
75 return fname
76
77 if os.environ.has_key('HOME'):
78 home = os.environ['HOME']
79 fname = os.path.join(home, '.asaprc')
80 if os.path.exists(fname):
81 return fname
82 return None
83
84
85defaultParams = {
86 # general
87 'verbose' : [True, _validate_bool],
88 'useplotter' : [True, _validate_bool],
89 'insitu' : [True, _validate_bool],
90
91 # plotting
92 'plotter.gui' : [True, _validate_bool],
93 'plotter.stacking' : ['p', str],
94 'plotter.panelling' : ['s', str],
95 'plotter.colours' : ['', str],
96 'plotter.linestyles' : ['', str],
97 'plotter.decimate' : [False, _validate_bool],
98 'plotter.ganged' : [True, _validate_bool],
99 'plotter.histogram' : [False, _validate_bool],
100 'plotter.papertype' : ['A4', str],
101
102 # scantable
103 'scantable.save' : ['ASAP', str],
104 'scantable.autoaverage' : [True, _validate_bool],
105 'scantable.freqframe' : ['LSRK', str], #default frequency frame
106 'scantable.verbosesummary' : [False, _validate_bool],
107 'scantable.storage' : ['memory', str]
108 # fitter
109 }
110
111def list_rcparameters():
112
113 print """
114# general
115# print verbose output
116verbose : True
117
118# preload a default plotter
119useplotter : True
120
121# apply operations on the input scantable or return new one
122insitu : True
123
124# plotting
125
126# do we want a GUI or plot to a file
127plotter.gui : True
128
129# default mode for colour stacking
130plotter.stacking : Pol
131
132# default mode for panelling
133plotter.panelling : scan
134
135# push panels together, to share axislabels
136plotter.ganged : True
137
138# decimate the number of points plotted bya afactor of
139# nchan/1024
140plotter.decimate : False
141
142# default colours/linestyles
143plotter.colours :
144plotter.linestyles :
145
146# enable/disable histogram plotting
147plotter.histogram : False
148
149# ps paper type
150plotter.papertype : A4
151
152# scantable
153
154# default storage of scantable ('memory'/'disk')
155scantable.storage : memory
156# default ouput format when saving
157scantable.save : ASAP
158# auto averaging on read
159scantable.autoaverage : True
160
161# default frequency frame to set when function
162# scantable.set_freqframe is called
163scantable.freqframe : LSRK
164
165# Control the level of information printed by summary
166scantable.verbosesummary : False
167
168# Fitter
169"""
170
171def rc_params():
172 'Return the default params updated from the values in the rc file'
173
174 fname = _asap_fname()
175
176 if fname is None or not os.path.exists(fname):
177 message = 'could not find rc file; returning defaults'
178 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
179 #print message
180 return ret
181
182 cnt = 0
183 for line in file(fname):
184 cnt +=1
185 line = line.strip()
186 if not len(line): continue
187 if line.startswith('#'): continue
188 tup = line.split(':',1)
189 if len(tup) !=2:
190 print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
191 continue
192
193 key, val = tup
194 key = key.strip()
195 if not defaultParams.has_key(key):
196 print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
197 continue
198
199 default, converter = defaultParams[key]
200
201 ind = val.find('#')
202 if ind>=0: val = val[:ind] # ignore trailing comments
203 val = val.strip()
204 try: cval = converter(val) # try to convert to proper type or raise
205 except ValueError, msg:
206 print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
207 continue
208 else:
209 # Alles Klar, update dict
210 defaultParams[key][0] = cval
211
212 # strip the conveter funcs and return
213 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
214 print ('loaded rc file %s'%fname)
215
216 return ret
217
218
219# this is the instance used by the asap classes
220rcParams = rc_params()
221
222rcParamsDefault = dict(rcParams.items()) # a copy
223
224def rc(group, **kwargs):
225 """
226 Set the current rc params. Group is the grouping for the rc, eg
227 for scantable.save the group is 'scantable', for plotter.stacking, the
228 group is 'plotter', and so on. kwargs is a list of attribute
229 name/value pairs, eg
230
231 rc('scantable', save='SDFITS')
232
233 sets the current rc params and is equivalent to
234
235 rcParams['scantable.save'] = 'SDFITS'
236
237 Use rcdefaults to restore the default rc params after changes.
238 """
239
240 aliases = {}
241
242 for k,v in kwargs.items():
243 name = aliases.get(k) or k
244 key = '%s.%s' % (group, name)
245 if not rcParams.has_key(key):
246 raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
247
248 rcParams[key] = v
249
250
251def rcdefaults():
252 """
253 Restore the default rc params - the ones that were created at
254 asap load time
255 """
256 rcParams.update(rcParamsDefault)
257
258def _n_bools(n, val):
259 return [ val for i in xrange(n) ]
260
261def _is_sequence_or_number(param, ptype=int):
262 if isinstance(param,tuple) or isinstance(param,list):
263 if len(param) == 0: return True # empty list
264 out = True
265 for p in param:
266 out &= isinstance(p,ptype)
267 return out
268 elif isinstance(param, ptype):
269 return True
270 return False
271
272def _to_list(param, ptype=int):
273 if isinstance(param, ptype):
274 if ptype is str: return param.split()
275 else: return [param]
276 if _is_sequence_or_number(param, ptype):
277 return param
278 return None
279
280def unique(x):
281 """
282 Return the unique values in a list
283 Parameters:
284 x: the list to reduce
285 Examples:
286 x = [1,2,3,3,4]
287 print unique(x)
288 [1,2,3,4]
289 """
290 return dict([ (val, 1) for val in x]).keys()
291
292def list_files(path=".",suffix="rpf"):
293 """
294 Return a list files readable by asap, such as rpf, sdfits, mbf, asap
295 Parameters:
296 path: The directory to list (default '.')
297 suffix: The file extension (default rpf)
298 Example:
299 files = list_files("data/","sdfits")
300 print files
301 ['data/2001-09-01_0332_P363.sdfits',
302 'data/2003-04-04_131152_t0002.sdfits',
303 'data/Sgr_86p262_best_SPC.sdfits']
304 """
305 if not os.path.isdir(path):
306 return None
307 valid = "rpf rpf.1 rpf.2 sdf sdfits mbf asap".split()
308 if not suffix in valid:
309 return None
310 files = [os.path.expanduser(os.path.expandvars(path+"/"+f)) for f in os.listdir(path)]
311 return filter(lambda x: x.endswith(suffix),files)
312
313# workaround for ipython, which redirects this if banner=0 in ipythonrc
314sys.stdout = sys.__stdout__
315sys.stderr = sys.__stderr__
316
317# Logging
318from asap._asap import Log as _asaplog
319global asaplog
320asaplog=_asaplog()
321if rcParams['verbose']:
322 asaplog.enable()
323else:
324 asaplog.disable()
325
326def print_log():
327 log = asaplog.pop()
328 if len(log) and rcParams['verbose']: print log
329 return
330
331def mask_and(a, b):
332 assert(len(a)==len(b))
333 return [ a[i] & b[i] for i in xrange(len(a)) ]
334
335def mask_or(a, b):
336 assert(len(a)==len(b))
337 return [ a[i] | b[i] for i in xrange(len(a)) ]
338
339def mask_not(a):
340 return [ not i for i in a ]
341
342from asapfitter import fitter
343from asapreader import reader
344from selector import selector
345
346from asapmath import *
347from scantable import scantable
348from asaplinefind import linefinder
349from linecatalog import linecatalog
350
351if rcParams['useplotter']:
352 try:
353 from asapplotter import asapplotter
354 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
355 if gui:
356 import pylab as xyplotter
357 plotter = asapplotter(gui)
358 del gui
359 except ImportError:
360 print "Matplotlib not installed. No plotting available"
361
362__date__ = '$Date: 2008-11-12 05:34:57 +0000 (Wed, 12 Nov 2008) $'.split()[1]
363__version__ = '2.2.0 alma'
364# nrao casapy specific, get revision number
365__revision__ = ' unknown '
366casapath=os.environ["AIPSPATH"].split()
367revinfo=casapath[0]+'/'+casapath[1]+'/python/2.5/asap/svninfo.txt'
368if os.path.isfile(revinfo):
369 f = file(revinfo)
370 f.readline()
371 revsionno=f.readline()
372 f.close()
373 __revision__ = revsionno.rstrip()
374
375def is_ipython():
376 return '__IP' in dir(sys.modules["__main__"])
377if is_ipython():
378 def version(): print "ASAP %s(%s)"% (__version__, __date__)
379 def list_scans(t = scantable):
380 import types
381 globs = sys.modules['__main__'].__dict__.iteritems()
382 print "The user created scantables are:"
383 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
384 print filter(lambda x: not x.startswith('_'), sts)
385 return
386
387 def commands():
388 x = """
389 [The scan container]
390 scantable - a container for integrations/scans
391 (can open asap/rpfits/sdfits and ms files)
392 copy - returns a copy of a scan
393 get_scan - gets a specific scan out of a scantable
394 (by name or number)
395 drop_scan - drops a specific scan out of a scantable
396 (by number)
397 set_selection - set a new subselection of the data
398 get_selection - get the current selection object
399 summary - print info about the scantable contents
400 stats - get specified statistic of the spectra in
401 the scantable
402 stddev - get the standard deviation of the spectra
403 in the scantable
404 get_tsys - get the TSys
405 get_time - get the timestamps of the integrations
406 get_inttime - get the integration time
407 get_sourcename - get the source names of the scans
408 get_azimuth - get the azimuth of the scans
409 get_elevation - get the elevation of the scans
410 get_parangle - get the parallactic angle of the scans
411 get_unit - get the current unit
412 set_unit - set the abcissa unit to be used from this
413 point on
414 get_abcissa - get the abcissa values and name for a given
415 row (time)
416 get_column_names - get the names of the columns in the scantable
417 for use with selector.set_query
418 set_freqframe - set the frame info for the Spectral Axis
419 (e.g. 'LSRK')
420 set_doppler - set the doppler to be used from this point on
421 set_dirframe - set the frame for the direction on the sky
422 set_instrument - set the instrument name
423 set_feedtype - set the feed type
424 get_fluxunit - get the brightness flux unit
425 set_fluxunit - set the brightness flux unit
426 create_mask - return an mask in the current unit
427 for the given region. The specified regions
428 are NOT masked
429 get_restfreqs - get the current list of rest frequencies
430 set_restfreqs - set a list of rest frequencies
431 shift_refpix - shift the reference pixel of the IFs
432 flag - flag selected channels in the data
433 lag_flag - flag specified frequency in the data
434 save - save the scantable to disk as either 'ASAP',
435 'SDFITS' or 'ASCII'
436 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
437 nscan - the number of scans in the scantable
438 nrow - te number of spectra in the scantable
439 history - print the history of the scantable
440 get_fit - get a fit which has been stored witnh the data
441 average_time - return the (weighted) time average of a scan
442 or a list of scans
443 average_pol - average the polarisations together.
444 average_beam - average the beams together.
445 convert_pol - convert to a different polarisation type
446 auto_quotient - return the on/off quotient with
447 automatic detection of the on/off scans (closest
448 in time off is selected)
449 mx_quotient - Form a quotient using MX data (off beams)
450 scale, *, / - return a scan scaled by a given factor
451 add, +, - - return a scan with given value added
452 bin - return a scan with binned channels
453 resample - return a scan with resampled channels
454 smooth - return the spectrally smoothed scan
455 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
456 auto_poly_baseline - automatically fit a polynomial baseline
457 recalc_azel - recalculate azimuth and elevation based on
458 the pointing
459 gain_el - apply gain-elevation correction
460 opacity - apply opacity correction
461 convert_flux - convert to and from Jy and Kelvin brightness
462 units
463 freq_align - align spectra in frequency frame
464 invert_phase - Invert the phase of the cross-correlation
465 swap_linears - Swap XX and YY (or RR LL)
466 rotate_xyphase - rotate XY phase of cross correlation
467 rotate_linpolphase - rotate the phase of the complex
468 polarization O=Q+iU correlation
469 freq_switch - perform frequency switching on the data
470 stats - Determine the specified statistic, e.g. 'min'
471 'max', 'rms' etc.
472 stddev - Determine the standard deviation of the current
473 beam/if/pol
474 [Selection]
475 selector - a selection object to set a subset of a scantable
476 set_scans - set (a list of) scans by index
477 set_cycles - set (a list of) cycles by index
478 set_beams - set (a list of) beamss by index
479 set_ifs - set (a list of) ifs by index
480 set_polarisations - set (a list of) polarisations by name
481 or by index
482 set_names - set a selection by name (wildcards allowed)
483 set_tsys - set a selection by tsys thresholds
484 set_query - set a selection by SQL-like query, e.g. BEAMNO==1
485 ( also get_ functions for all these )
486 reset - unset all selections
487 + - merge two selections
488
489 [Math] Mainly functions which operate on more than one scantable
490
491 average_time - return the (weighted) time average
492 of a list of scans
493 quotient - return the on/off quotient
494 simple_math - simple mathematical operations on two scantables,
495 'add', 'sub', 'mul', 'div'
496 quotient - build quotient of the given on and off scans
497 (matched pairs and 1 off - n on are valid)
498 merge - merge a list of scantables
499
500 [Line Catalog]
501 linecatalog - a linecatalog wrapper, taking an ASCII or
502 internal format table
503 summary - print a summary of the current selection
504 set_name - select a subset by name pattern, e.g. '*OH*'
505 set_strength_limits - select a subset by line strength limits
506 set_frequency_limits - select a subset by frequency limits
507 reset - unset all selections
508 save - save the current subset to a table (internal
509 format)
510 get_row - get the name and frequency from a specific
511 row in the table
512 [Fitting]
513 fitter
514 auto_fit - return a scan where the function is
515 applied to all Beams/IFs/Pols.
516 commit - return a new scan where the fits have been
517 commited.
518 fit - execute the actual fitting process
519 store_fit - store the fit parameters in the data (scantable)
520 get_chi2 - get the Chi^2
521 set_scan - set the scantable to be fit
522 set_function - set the fitting function
523 set_parameters - set the parameters for the function(s), and
524 set if they should be held fixed during fitting
525 set_gauss_parameters - same as above but specialised for individual
526 gaussian components
527 get_parameters - get the fitted parameters
528 plot - plot the resulting fit and/or components and
529 residual
530 [Plotter]
531 asapplotter - a plotter for asap, default plotter is
532 called 'plotter'
533 plot - plot a scantable
534 plot_lines - plot a linecatalog overlay
535 save - save the plot to a file ('png' ,'ps' or 'eps')
536 set_mode - set the state of the plotter, i.e.
537 what is to be plotted 'colour stacked'
538 and what 'panelled'
539 set_selection - only plot a selected part of the data
540 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
541 set_legend - specify user labels for the legend indeces
542 set_title - specify user labels for the panel indeces
543 set_abcissa - specify a user label for the abcissa
544 set_ordinate - specify a user label for the ordinate
545 set_layout - specify the multi-panel layout (rows,cols)
546 set_colors - specify a set of colours to use
547 set_linestyles - specify a set of linestyles to use if only
548 using one color
549 set_font - set general font properties, e.g. 'family'
550 set_histogram - plot in historam style
551 set_mask - set a plotting mask for a specific polarization
552 text - draw text annotations either in data or relative
553 coordinates
554 arrow - draw arrow annotations either in data or relative
555 coordinates
556 axhline,axvline - draw horizontal/vertical lines
557 axhspan,axvspan - draw horizontal/vertical regions
558
559 xyplotter - matplotlib/pylab plotting functions
560
561 [Reading files]
562 reader - access rpfits/sdfits files
563 open - attach reader to a file
564 close - detach reader from file
565 read - read in integrations
566 summary - list info about all integrations
567
568 [General]
569 commands - this command
570 print - print details about a variable
571 list_scans - list all scantables created bt the user
572 list_files - list all files readable by asap (default rpf)
573 del - delete the given variable from memory
574 range - create a list of values, e.g.
575 range(3) = [0,1,2], range(2,5) = [2,3,4]
576 help - print help for one of the listed functions
577 execfile - execute an asap script, e.g. execfile('myscript')
578 list_rcparameters - print out a list of possible values to be
579 put into $HOME/.asaprc
580 rc - set rc parameters from within asap
581 mask_and,mask_or,
582 mask_not - boolean operations on masks created with
583 scantable.create_mask
584
585 Note:
586 How to use this with help:
587 # function 'summary'
588 [xxx] is just a category
589 Every 'sub-level' in this list should be replaces by a '.' Period when
590 using help
591 Example:
592 ASAP> help scantable # to get info on ths scantable
593 ASAP> help scantable.summary # to get help on the scantable's
594 ASAP> help average_time
595
596 """
597 if rcParams['verbose']:
598 try:
599 from IPython.genutils import page as pager
600 except ImportError:
601 from pydoc import pager
602 pager(x)
603 else:
604 print x
605 return
606
607def welcome():
608 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
609
610Please report any bugs via:
611http://svn.atnf.csiro.au/trac/asap/simpleticket
612
613[IMPORTANT: ASAP is 0-based]
614Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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