source: tags/Release2.1.1b/python/__init__.py@ 1283

Last change on this file since 1283 was 1283, checked in by mar637, 19 years ago

Fix for Ticket #88 - removed use of numpy/numarray except for plotting where it is used via matplotlib.numerix

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Line 
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"]
24os.environ["AIPSPATH"] = "%s %s somwhere" % ( asapdata, plf)
25# set up user space
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()
35# remove from namespace
36del asapdata, userdir, shutil, platform
37
38def _validate_bool(b):
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
46def _validate_int(s):
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
52def _asap_fname():
53 """
54 Return the path to the rc file
55
56 Search order:
57
58 * current working dir
59 * environ var ASAPRC
60 * HOME/.asaprc
61
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
81
82defaultParams = {
83 # general
84 'verbose' : [True, _validate_bool],
85 'useplotter' : [True, _validate_bool],
86 'insitu' : [True, _validate_bool],
87
88 # plotting
89 'plotter.gui' : [True, _validate_bool],
90 'plotter.stacking' : ['p', str],
91 'plotter.panelling' : ['s', str],
92 'plotter.colours' : ['', str],
93 'plotter.linestyles' : ['', str],
94 'plotter.decimate' : [False, _validate_bool],
95 'plotter.ganged' : [True, _validate_bool],
96 'plotter.histogram' : [False, _validate_bool],
97 'plotter.papertype' : ['A4', str],
98
99 # scantable
100 'scantable.save' : ['ASAP', str],
101 'scantable.autoaverage' : [True, _validate_bool],
102 'scantable.freqframe' : ['LSRK', str], #default frequency frame
103 'scantable.verbosesummary' : [False, _validate_bool],
104 'scantable.storage' : ['memory', str]
105 # fitter
106 }
107
108def list_rcparameters():
109
110 print """
111# general
112# print verbose output
113verbose : True
114
115# preload a default plotter
116useplotter : True
117
118# apply operations on the input scantable or return new one
119insitu : True
120
121# plotting
122
123# do we want a GUI or plot to a file
124plotter.gui : True
125
126# default mode for colour stacking
127plotter.stacking : Pol
128
129# default mode for panelling
130plotter.panelling : scan
131
132# push panels together, to share axislabels
133plotter.ganged : True
134
135# decimate the number of points plotted bya afactor of
136# nchan/1024
137plotter.decimate : False
138
139# default colours/linestyles
140plotter.colours :
141plotter.linestyles :
142
143# enable/disable histogram plotting
144plotter.histogram : False
145
146# ps paper type
147plotter.papertype : A4
148
149# scantable
150
151# default storage of scantable ('memory'/'disk')
152scantable.storage : memory
153# default ouput format when saving
154scantable.save : ASAP
155# auto averaging on read
156scantable.autoaverage : True
157
158# default frequency frame to set when function
159# scantable.set_freqframe is called
160scantable.freqframe : LSRK
161
162# Control the level of information printed by summary
163scantable.verbosesummary : False
164
165# Fitter
166"""
167
168def rc_params():
169 'Return the default params updated from the values in the rc file'
170
171 fname = _asap_fname()
172
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
178
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
189
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
195
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
202 except ValueError, msg:
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()])
211 print ('loaded rc file %s'%fname)
212
213 return ret
214
215
216# this is the instance used by the asap classes
217rcParams = rc_params()
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
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 name/value pairs, eg
227
228 rc('scantable', save='SDFITS')
229
230 sets the current rc params and is equivalent to
231
232 rcParams['scantable.save'] = 'SDFITS'
233
234 Use rcdefaults to restore the default rc params after changes.
235 """
236
237 aliases = {}
238
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))
244
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
255def _n_bools(n, val):
256 return [ val for i in xrange(n) ]
257
258def _is_sequence_or_number(param, ptype=int):
259 if isinstance(param,tuple) or isinstance(param,list):
260 if len(param) == 0: return True # empty list
261 out = True
262 for p in param:
263 out &= isinstance(p,ptype)
264 return out
265 elif isinstance(param, ptype):
266 return True
267 return False
268
269def _to_list(param, ptype=int):
270 if isinstance(param, ptype):
271 if ptype is str: return param.split()
272 else: return [param]
273 if _is_sequence_or_number(param, ptype):
274 return param
275 return None
276
277def unique(x):
278 """
279 Return the unique values in a list
280 Parameters:
281 x: the list to reduce
282 Examples:
283 x = [1,2,3,3,4]
284 print unique(x)
285 [1,2,3,4]
286 """
287 return dict([ (val, 1) for val in x]).keys()
288
289def list_files(path=".",suffix="rpf"):
290 """
291 Return a list files readable by asap, such as rpf, sdfits, mbf, asap
292 Parameters:
293 path: The directory to list (default '.')
294 suffix: The file extension (default rpf)
295 Example:
296 files = list_files("data/","sdfits")
297 print files
298 ['data/2001-09-01_0332_P363.sdfits',
299 'data/2003-04-04_131152_t0002.sdfits',
300 'data/Sgr_86p262_best_SPC.sdfits']
301 """
302 import os
303 if not os.path.isdir(path):
304 return None
305 valid = "rpf rpf.1 rpf.2 sdf sdfits mbf asap".split()
306 if not suffix in valid:
307 return None
308 files = [os.path.expanduser(os.path.expandvars(path+"/"+f)) for f in os.listdir(path)]
309 return filter(lambda x: x.endswith(suffix),files)
310
311# workaround for ipython, which redirects this if banner=0 in ipythonrc
312sys.stdout = sys.__stdout__
313sys.stderr = sys.__stderr__
314
315# Logging
316from asap._asap import Log as _asaplog
317global asaplog
318asaplog=_asaplog()
319if rcParams['verbose']:
320 asaplog.enable()
321else:
322 asaplog.disable()
323
324def print_log():
325 log = asaplog.pop()
326 if len(log) and rcParams['verbose']: print log
327 return
328
329def mask_and(a, b):
330 assert(len(a)==len(b))
331 return [ a[i] & b[i] for i in xrange(len(a)) ]
332
333def mask_or(a, b):
334 assert(len(a)==len(b))
335 return [ a[i] | b[i] for i in xrange(len(a)) ]
336
337def mask_not(a):
338 return [ not i for i in a ]
339
340from asapfitter import fitter
341from asapreader import reader
342from selector import selector
343
344from asapmath import *
345from scantable import scantable
346from asaplinefind import linefinder
347from linecatalog import linecatalog
348
349if rcParams['useplotter']:
350 try:
351 from asapplotter import asapplotter
352 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
353 if gui:
354 import pylab as xyplotter
355 plotter = asapplotter(gui)
356 del gui
357 except ImportError:
358 print "Matplotlib not installed. No plotting available"
359
360__date__ = '$Date: 2006-11-06 01:10:26 +0000 (Mon, 06 Nov 2006) $'.split()[1]
361__version__ = '2.1.1b'
362
363def is_ipython():
364 return '__IP' in dir(sys.modules["__main__"])
365if is_ipython():
366 def version(): print "ASAP %s(%s)"% (__version__, __date__)
367 def list_scans(t = scantable):
368 import sys, types
369 globs = sys.modules['__main__'].__dict__.iteritems()
370 print "The user created scantables are:"
371 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
372 print filter(lambda x: not x.startswith('_'), sts)
373 return
374
375 def commands():
376 x = """
377 [The scan container]
378 scantable - a container for integrations/scans
379 (can open asap/rpfits/sdfits and ms files)
380 copy - returns a copy of a scan
381 get_scan - gets a specific scan out of a scantable
382 (by name or number)
383 drop_scan - drops a specific scan out of a scantable
384 (by number)
385 set_selection - set a new subselection of the data
386 get_selection - get the current selection object
387 summary - print info about the scantable contents
388 stats - get specified statistic of the spectra in
389 the scantable
390 stddev - get the standard deviation of the spectra
391 in the scantable
392 get_tsys - get the TSys
393 get_time - get the timestamps of the integrations
394 get_sourcename - get the source names of the scans
395 get_azimuth - get the azimuth of the scans
396 get_elevation - get the elevation of the scans
397 get_parangle - get the parallactic angle of the scans
398 get_unit - get the current unit
399 set_unit - set the abcissa unit to be used from this
400 point on
401 get_abcissa - get the abcissa values and name for a given
402 row (time)
403 get_column_names - get the names of the columns in the scantable
404 for use with selector.set_query
405 set_freqframe - set the frame info for the Spectral Axis
406 (e.g. 'LSRK')
407 set_doppler - set the doppler to be used from this point on
408 set_dirframe - set the frame for the direction on the sky
409 set_instrument - set the instrument name
410 set_feedtype - set the feed type
411 get_fluxunit - get the brightness flux unit
412 set_fluxunit - set the brightness flux unit
413 create_mask - return an mask in the current unit
414 for the given region. The specified regions
415 are NOT masked
416 get_restfreqs - get the current list of rest frequencies
417 set_restfreqs - set a list of rest frequencies
418 flag - flag selected channels in the data
419 lag_flag - flag specified frequency in the data
420 save - save the scantable to disk as either 'ASAP',
421 'SDFITS' or 'ASCII'
422 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
423 nscan - the number of scans in the scantable
424 nrow - te number of spectra in the scantable
425 history - print the history of the scantable
426 get_fit - get a fit which has been stored witnh the data
427 average_time - return the (weighted) time average of a scan
428 or a list of scans
429 average_pol - average the polarisations together.
430 average_beam - average the beams together.
431 convert_pol - convert to a different polarisation type
432 auto_quotient - return the on/off quotient with
433 automatic detection of the on/off scans (closest
434 in time off is selected)
435 mx_quotient - Form a quotient using MX data (off beams)
436 scale, *, / - return a scan scaled by a given factor
437 add, +, - - return a scan with given value added
438 bin - return a scan with binned channels
439 resample - return a scan with resampled channels
440 smooth - return the spectrally smoothed scan
441 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
442 auto_poly_baseline - automatically fit a polynomial baseline
443 recalc_azel - recalculate azimuth and elevation based on
444 the pointing
445 gain_el - apply gain-elevation correction
446 opacity - apply opacity correction
447 convert_flux - convert to and from Jy and Kelvin brightness
448 units
449 freq_align - align spectra in frequency frame
450 invert_phase - Invert the phase of the cross-correlation
451 swap_linears - Swap XX and YY
452 rotate_xyphase - rotate XY phase of cross correlation
453 rotate_linpolphase - rotate the phase of the complex
454 polarization O=Q+iU correlation
455 freq_switch - perform frequency switching on the data
456 stats - Determine the specified statistic, e.g. 'min'
457 'max', 'rms' etc.
458 stddev - Determine the standard deviation of the current
459 beam/if/pol
460 [Selection]
461 selector - a selection object to set a subset of a scantable
462 set_scans - set (a list of) scans by index
463 set_cycles - set (a list of) cycles by index
464 set_beams - set (a list of) beamss by index
465 set_ifs - set (a list of) ifs by index
466 set_polarisations - set (a list of) polarisations by name
467 or by index
468 set_names - set a selection by name (wildcards allowed)
469 set_tsys - set a selection by tsys thresholds
470 set_query - set a selection by SQL-like query, e.g. BEAMNO==1
471 reset - unset all selections
472 + - merge to selections
473
474 [Math] Mainly functions which operate on more than one scantable
475
476 average_time - return the (weighted) time average
477 of a list of scans
478 quotient - return the on/off quotient
479 simple_math - simple mathematical operations on two scantables,
480 'add', 'sub', 'mul', 'div'
481 quotient - build quotient of the given on and off scans
482 (matched pairs and 1 off/n on are valid)
483 merge - merge a list of scantables
484
485 [Line Catalog]
486 linecatalog - a linecatalog wrapper, taking an ASCII or
487 internal format table
488 summary - print a summary of the current selection
489 set_name - select a subset by name pattern, e.g. '*OH*'
490 set_strength_limits - select a subset by line strength limits
491 set_frequency_limits - select a subset by frequency limits
492 reset - unset all selections
493 save - save the current subset to a table (internal
494 format)
495 get_row - get the name and frequency from a specific
496 row in the table
497 [Fitting]
498 fitter
499 auto_fit - return a scan where the function is
500 applied to all Beams/IFs/Pols.
501 commit - return a new scan where the fits have been
502 commited.
503 fit - execute the actual fitting process
504 store_fit - store the fit parameters in the data (scantable)
505 get_chi2 - get the Chi^2
506 set_scan - set the scantable to be fit
507 set_function - set the fitting function
508 set_parameters - set the parameters for the function(s), and
509 set if they should be held fixed during fitting
510 set_gauss_parameters - same as above but specialised for individual
511 gaussian components
512 get_parameters - get the fitted parameters
513 plot - plot the resulting fit and/or components and
514 residual
515 [Plotter]
516 asapplotter - a plotter for asap, default plotter is
517 called 'plotter'
518 plot - plot a scantable
519 plot_lines - plot a linecatalog overlay
520 save - save the plot to a file ('png' ,'ps' or 'eps')
521 set_mode - set the state of the plotter, i.e.
522 what is to be plotted 'colour stacked'
523 and what 'panelled'
524 set_selection - only plot a selected part of the data
525 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
526 set_legend - specify user labels for the legend indeces
527 set_title - specify user labels for the panel indeces
528 set_abcissa - specify a user label for the abcissa
529 set_ordinate - specify a user label for the ordinate
530 set_layout - specify the multi-panel layout (rows,cols)
531 set_colors - specify a set of colours to use
532 set_linestyles - specify a set of linestyles to use if only
533 using one color
534 set_font - set general font properties, e.g. 'family'
535 set_histogram - plot in historam style
536 set_mask - set a plotting mask for a specific polarization
537 text - draw text annotations either in data or relative
538 coordinates
539 arrow - draw arrow annotations either in data or relative
540 coordinates
541 axhline,axvline - draw horizontal/vertical lines
542 axhspan,axvspan - draw horizontal/vertical regions
543
544 xyplotter - matplotlib/pylab plotting functions
545
546 [Reading files]
547 reader - access rpfits/sdfits files
548 open - attach reader to a file
549 close - detach reader from file
550 read - read in integrations
551 summary - list info about all integrations
552
553 [General]
554 commands - this command
555 print - print details about a variable
556 list_scans - list all scantables created bt the user
557 list_files - list all files readable by asap (default rpf)
558 del - delete the given variable from memory
559 range - create a list of values, e.g.
560 range(3) = [0,1,2], range(2,5) = [2,3,4]
561 help - print help for one of the listed functions
562 execfile - execute an asap script, e.g. execfile('myscript')
563 list_rcparameters - print out a list of possible values to be
564 put into $HOME/.asaprc
565 rc - set rc parameters from within asap
566 mask_and,mask_or,
567 mask_not - boolean operations on masks created with
568 scantable.create_mask
569
570 Note:
571 How to use this with help:
572 # function 'summary'
573 [xxx] is just a category
574 Every 'sub-level' in this list should be replaces by a '.' Period when
575 using help
576 Example:
577 ASAP> help scantable # to get info on ths scantable
578 ASAP> help scantable.summary # to get help on the scantable's
579 ASAP> help average_time
580
581 """
582 if rcParams['verbose']:
583 try:
584 from IPython.genutils import page as pager
585 except ImportError:
586 from pydoc import pager
587 pager(x)
588 else:
589 print x
590 return
591
592def welcome():
593 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
594
595Please report any bugs via:
596http://sourcecode.atnf.csiro.au/cgi-bin/trac_asap.cgi/newticket
597
598[IMPORTANT: ASAP is 0-based]
599Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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