source: trunk/python/__init__.py@ 1471

Last change on this file since 1471 was 1471, checked in by Malte Marquarding, 17 years ago

added publich get/set_spectrum functions

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 23.2 KB
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"]
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 shutil.copyfile(asapdata+"/data/ipy_user_conf.py",
35 userdir+"/ipy_user_conf.py")
36 f = file(userdir+"/asapuserfuncs.py", "w")
37 f.close()
38 f = file(userdir+"/ipythonrc", "w")
39 f.close()
40# remove from namespace
41del asapdata, userdir, shutil, platform
42
43def _validate_bool(b):
44 'Convert b to a boolean or raise'
45 bl = b.lower()
46 if bl in ('f', 'no', 'false', '0', 0): return False
47 elif bl in ('t', 'yes', 'true', '1', 1): return True
48 else:
49 raise ValueError('Could not convert "%s" to boolean' % b)
50
51def _validate_int(s):
52 'convert s to int or raise'
53 try: return int(s)
54 except ValueError:
55 raise ValueError('Could not convert "%s" to int' % s)
56
57def _asap_fname():
58 """
59 Return the path to the rc file
60
61 Search order:
62
63 * current working dir
64 * environ var ASAPRC
65 * HOME/.asaprc
66
67 """
68
69 fname = os.path.join( os.getcwd(), '.asaprc')
70 if os.path.exists(fname): return fname
71
72 if os.environ.has_key('ASAPRC'):
73 path = os.environ['ASAPRC']
74 if os.path.exists(path):
75 fname = os.path.join(path, '.asaprc')
76 if os.path.exists(fname):
77 return fname
78
79 if os.environ.has_key('HOME'):
80 home = os.environ['HOME']
81 fname = os.path.join(home, '.asaprc')
82 if os.path.exists(fname):
83 return fname
84 return None
85
86
87defaultParams = {
88 # general
89 'verbose' : [True, _validate_bool],
90 'useplotter' : [True, _validate_bool],
91 'insitu' : [True, _validate_bool],
92
93 # plotting
94 'plotter.gui' : [True, _validate_bool],
95 'plotter.stacking' : ['p', str],
96 'plotter.panelling' : ['s', str],
97 'plotter.colours' : ['', str],
98 'plotter.linestyles' : ['', str],
99 'plotter.decimate' : [False, _validate_bool],
100 'plotter.ganged' : [True, _validate_bool],
101 'plotter.histogram' : [False, _validate_bool],
102 'plotter.papertype' : ['A4', str],
103
104 # scantable
105 'scantable.save' : ['ASAP', str],
106 'scantable.autoaverage' : [True, _validate_bool],
107 'scantable.freqframe' : ['LSRK', str], #default frequency frame
108 'scantable.verbosesummary' : [False, _validate_bool],
109 'scantable.storage' : ['memory', str],
110 'scantable.history' : [True, _validate_bool]
111 # fitter
112 }
113
114def list_rcparameters():
115
116 print """
117# general
118# print verbose output
119verbose : True
120
121# preload a default plotter
122useplotter : True
123
124# apply operations on the input scantable or return new one
125insitu : True
126
127# plotting
128
129# do we want a GUI or plot to a file
130plotter.gui : True
131
132# default mode for colour stacking
133plotter.stacking : Pol
134
135# default mode for panelling
136plotter.panelling : scan
137
138# push panels together, to share axislabels
139plotter.ganged : True
140
141# decimate the number of points plotted bya afactor of
142# nchan/1024
143plotter.decimate : False
144
145# default colours/linestyles
146plotter.colours :
147plotter.linestyles :
148
149# enable/disable histogram plotting
150plotter.histogram : False
151
152# ps paper type
153plotter.papertype : A4
154
155# scantable
156
157# default storage of scantable ('memory'/'disk')
158scantable.storage : memory
159
160# write history of each call to scantable
161scantable.history : True
162
163# default ouput format when saving
164scantable.save : ASAP
165
166# auto averaging on read
167scantable.autoaverage : True
168
169# default frequency frame to set when function
170# scantable.set_freqframe is called
171scantable.freqframe : LSRK
172
173# Control the level of information printed by summary
174scantable.verbosesummary : False
175
176# Fitter
177"""
178
179def rc_params():
180 'Return the default params updated from the values in the rc file'
181
182 fname = _asap_fname()
183
184 if fname is None or not os.path.exists(fname):
185 message = 'could not find rc file; returning defaults'
186 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
187 #print message
188 return ret
189
190 cnt = 0
191 for line in file(fname):
192 cnt +=1
193 line = line.strip()
194 if not len(line): continue
195 if line.startswith('#'): continue
196 tup = line.split(':',1)
197 if len(tup) !=2:
198 print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
199 continue
200
201 key, val = tup
202 key = key.strip()
203 if not defaultParams.has_key(key):
204 print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
205 continue
206
207 default, converter = defaultParams[key]
208
209 ind = val.find('#')
210 if ind>=0: val = val[:ind] # ignore trailing comments
211 val = val.strip()
212 try: cval = converter(val) # try to convert to proper type or raise
213 except ValueError, msg:
214 print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
215 continue
216 else:
217 # Alles Klar, update dict
218 defaultParams[key][0] = cval
219
220 # strip the conveter funcs and return
221 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
222 print ('loaded rc file %s'%fname)
223
224 return ret
225
226
227# this is the instance used by the asap classes
228rcParams = rc_params()
229
230rcParamsDefault = dict(rcParams.items()) # a copy
231
232def rc(group, **kwargs):
233 """
234 Set the current rc params. Group is the grouping for the rc, eg
235 for scantable.save the group is 'scantable', for plotter.stacking, the
236 group is 'plotter', and so on. kwargs is a list of attribute
237 name/value pairs, eg
238
239 rc('scantable', save='SDFITS')
240
241 sets the current rc params and is equivalent to
242
243 rcParams['scantable.save'] = 'SDFITS'
244
245 Use rcdefaults to restore the default rc params after changes.
246 """
247
248 aliases = {}
249
250 for k,v in kwargs.items():
251 name = aliases.get(k) or k
252 if len(group):
253 key = '%s.%s' % (group, name)
254 else:
255 key = name
256 if not rcParams.has_key(key):
257 raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
258
259 rcParams[key] = v
260
261
262def rcdefaults():
263 """
264 Restore the default rc params - the ones that were created at
265 asap load time
266 """
267 rcParams.update(rcParamsDefault)
268
269def _n_bools(n, val):
270 return [ val for i in xrange(n) ]
271
272def _is_sequence_or_number(param, ptype=int):
273 if isinstance(param,tuple) or isinstance(param,list):
274 if len(param) == 0: return True # empty list
275 out = True
276 for p in param:
277 out &= isinstance(p,ptype)
278 return out
279 elif isinstance(param, ptype):
280 return True
281 return False
282
283def _to_list(param, ptype=int):
284 if isinstance(param, ptype):
285 if ptype is str: return param.split()
286 else: return [param]
287 if _is_sequence_or_number(param, ptype):
288 return param
289 return None
290
291def unique(x):
292 """
293 Return the unique values in a list
294 Parameters:
295 x: the list to reduce
296 Examples:
297 x = [1,2,3,3,4]
298 print unique(x)
299 [1,2,3,4]
300 """
301 return dict([ (val, 1) for val in x]).keys()
302
303def list_files(path=".",suffix="rpf"):
304 """
305 Return a list files readable by asap, such as rpf, sdfits, mbf, asap
306 Parameters:
307 path: The directory to list (default '.')
308 suffix: The file extension (default rpf)
309 Example:
310 files = list_files("data/","sdfits")
311 print files
312 ['data/2001-09-01_0332_P363.sdfits',
313 'data/2003-04-04_131152_t0002.sdfits',
314 'data/Sgr_86p262_best_SPC.sdfits']
315 """
316 if not os.path.isdir(path):
317 return None
318 valid = "rpf rpf.1 rpf.2 sdf sdfits mbf asap".split()
319 if not suffix in valid:
320 return None
321 files = [os.path.expanduser(os.path.expandvars(path+"/"+f)) for f in os.listdir(path)]
322 return filter(lambda x: x.endswith(suffix),files)
323
324# workaround for ipython, which redirects this if banner=0 in ipythonrc
325sys.stdout = sys.__stdout__
326sys.stderr = sys.__stderr__
327
328# Logging
329from asap._asap import Log as _asaplog
330global asaplog
331asaplog=_asaplog()
332if rcParams['verbose']:
333 asaplog.enable()
334else:
335 asaplog.disable()
336
337def print_log():
338 log = asaplog.pop()
339 if len(log) and rcParams['verbose']: print log
340 return
341
342def mask_and(a, b):
343 assert(len(a)==len(b))
344 return [ a[i] & b[i] for i in xrange(len(a)) ]
345
346def mask_or(a, b):
347 assert(len(a)==len(b))
348 return [ a[i] | b[i] for i in xrange(len(a)) ]
349
350def mask_not(a):
351 return [ not i for i in a ]
352
353from asapfitter import fitter
354from asapreader import reader
355from selector import selector
356
357from asapmath import *
358from scantable import scantable
359from asaplinefind import linefinder
360from linecatalog import linecatalog
361
362if rcParams['useplotter']:
363 try:
364 from asapplotter import asapplotter
365 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
366 if gui:
367 import matplotlib
368 matplotlib.use("TkAgg")
369 import pylab
370 xyplotter = pylab
371 plotter = asapplotter(gui)
372 del gui
373 except ImportError:
374 print "Matplotlib not installed. No plotting available"
375
376__date__ = '$Date: 2009-01-15 01:10:40 +0000 (Thu, 15 Jan 2009) $'.split()[1]
377__version__ = 'trunk'
378
379def is_ipython():
380 return '__IP' in dir(sys.modules["__main__"])
381if is_ipython():
382 def version(): print "ASAP %s(%s)"% (__version__, __date__)
383
384 def list_scans(t = scantable):
385 import types
386 globs = sys.modules['__main__'].__dict__.iteritems()
387 print "The user created scantables are:"
388 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
389 print filter(lambda x: not x.startswith('_'), sts)
390 return
391
392 def commands():
393 x = """
394 [The scan container]
395 scantable - a container for integrations/scans
396 (can open asap/rpfits/sdfits and ms files)
397 copy - returns a copy of a scan
398 get_scan - gets a specific scan out of a scantable
399 (by name or number)
400 drop_scan - drops a specific scan out of a scantable
401 (by number)
402 set_selection - set a new subselection of the data
403 get_selection - get the current selection object
404 summary - print info about the scantable contents
405 stats - get specified statistic of the spectra in
406 the scantable
407 stddev - get the standard deviation of the spectra
408 in the scantable
409 get_tsys - get the TSys
410 get_time - get the timestamps of the integrations
411 get_inttime - get the integration time
412 get_sourcename - get the source names of the scans
413 get_azimuth - get the azimuth of the scans
414 get_elevation - get the elevation of the scans
415 get_parangle - get the parallactic angle of the scans
416 get_unit - get the current unit
417 set_unit - set the abcissa unit to be used from this
418 point on
419 get_abcissa - get the abcissa values and name for a given
420 row (time)
421 get_column_names - get the names of the columns in the scantable
422 for use with selector.set_query
423 set_freqframe - set the frame info for the Spectral Axis
424 (e.g. 'LSRK')
425 set_doppler - set the doppler to be used from this point on
426 set_dirframe - set the frame for the direction on the sky
427 set_instrument - set the instrument name
428 set_feedtype - set the feed type
429 get_fluxunit - get the brightness flux unit
430 set_fluxunit - set the brightness flux unit
431 create_mask - return an mask in the current unit
432 for the given region. The specified regions
433 are NOT masked
434 get_restfreqs - get the current list of rest frequencies
435 set_restfreqs - set a list of rest frequencies
436 shift_refpix - shift the reference pixel of the IFs
437 set_spectrum - overwrite the spectrum for a given row
438 get_spectrum - retrieve the spectrum for a given
439 get_mask - retrieve the mask for a given
440 flag - flag selected channels in the data
441 lag_flag - flag specified frequency in the data
442 save - save the scantable to disk as either 'ASAP',
443 'SDFITS' or 'ASCII'
444 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
445 nscan - the number of scans in the scantable
446 nrow - the number of spectra in the scantable
447 history - print the history of the scantable
448 get_fit - get a fit which has been stored witnh the data
449 average_time - return the (weighted) time average of a scan
450 or a list of scans
451 average_pol - average the polarisations together.
452 average_beam - average the beams together.
453 convert_pol - convert to a different polarisation type
454 auto_quotient - return the on/off quotient with
455 automatic detection of the on/off scans (closest
456 in time off is selected)
457 mx_quotient - Form a quotient using MX data (off beams)
458 scale, *, / - return a scan scaled by a given factor
459 add, +, - - return a scan with given value added
460 bin - return a scan with binned channels
461 resample - return a scan with resampled channels
462 smooth - return the spectrally smoothed scan
463 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
464 auto_poly_baseline - automatically fit a polynomial baseline
465 recalc_azel - recalculate azimuth and elevation based on
466 the pointing
467 gain_el - apply gain-elevation correction
468 opacity - apply opacity correction
469 convert_flux - convert to and from Jy and Kelvin brightness
470 units
471 freq_align - align spectra in frequency frame
472 invert_phase - Invert the phase of the cross-correlation
473 swap_linears - Swap XX and YY (or RR LL)
474 rotate_xyphase - rotate XY phase of cross correlation
475 rotate_linpolphase - rotate the phase of the complex
476 polarization O=Q+iU correlation
477 freq_switch - perform frequency switching on the data
478 stats - Determine the specified statistic, e.g. 'min'
479 'max', 'rms' etc.
480 stddev - Determine the standard deviation of the current
481 beam/if/pol
482 [Selection]
483 selector - a selection object to set a subset of a scantable
484 set_scans - set (a list of) scans by index
485 set_cycles - set (a list of) cycles by index
486 set_beams - set (a list of) beamss by index
487 set_ifs - set (a list of) ifs by index
488 set_polarisations - set (a list of) polarisations by name
489 or by index
490 set_names - set a selection by name (wildcards allowed)
491 set_tsys - set a selection by tsys thresholds
492 set_query - set a selection by SQL-like query, e.g. BEAMNO==1
493 ( also get_ functions for all these )
494 reset - unset all selections
495 + - merge two selections
496
497 [Math] Mainly functions which operate on more than one scantable
498
499 average_time - return the (weighted) time average
500 of a list of scans
501 quotient - return the on/off quotient
502 simple_math - simple mathematical operations on two scantables,
503 'add', 'sub', 'mul', 'div'
504 quotient - build quotient of the given on and off scans
505 (matched pairs and 1 off - n on are valid)
506 merge - merge a list of scantables
507
508 [Line Catalog]
509 linecatalog - a linecatalog wrapper, taking an ASCII or
510 internal format table
511 summary - print a summary of the current selection
512 set_name - select a subset by name pattern, e.g. '*OH*'
513 set_strength_limits - select a subset by line strength limits
514 set_frequency_limits - select a subset by frequency limits
515 reset - unset all selections
516 save - save the current subset to a table (internal
517 format)
518 get_row - get the name and frequency from a specific
519 row in the table
520 [Fitting]
521 fitter
522 auto_fit - return a scan where the function is
523 applied to all Beams/IFs/Pols.
524 commit - return a new scan where the fits have been
525 commited.
526 fit - execute the actual fitting process
527 store_fit - store the fit parameters in the data (scantable)
528 get_chi2 - get the Chi^2
529 set_scan - set the scantable to be fit
530 set_function - set the fitting function
531 set_parameters - set the parameters for the function(s), and
532 set if they should be held fixed during fitting
533 set_gauss_parameters - same as above but specialised for individual
534 gaussian components
535 get_parameters - get the fitted parameters
536 plot - plot the resulting fit and/or components and
537 residual
538 [Plotter]
539 asapplotter - a plotter for asap, default plotter is
540 called 'plotter'
541 plot - plot a scantable
542 plot_lines - plot a linecatalog overlay
543 save - save the plot to a file ('png' ,'ps' or 'eps')
544 set_mode - set the state of the plotter, i.e.
545 what is to be plotted 'colour stacked'
546 and what 'panelled'
547 set_selection - only plot a selected part of the data
548 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
549 set_legend - specify user labels for the legend indeces
550 set_title - specify user labels for the panel indeces
551 set_abcissa - specify a user label for the abcissa
552 set_ordinate - specify a user label for the ordinate
553 set_layout - specify the multi-panel layout (rows,cols)
554 set_colors - specify a set of colours to use
555 set_linestyles - specify a set of linestyles to use if only
556 using one color
557 set_font - set general font properties, e.g. 'family'
558 set_histogram - plot in historam style
559 set_mask - set a plotting mask for a specific polarization
560 text - draw text annotations either in data or relative
561 coordinates
562 arrow - draw arrow annotations either in data or relative
563 coordinates
564 axhline,axvline - draw horizontal/vertical lines
565 axhspan,axvspan - draw horizontal/vertical regions
566
567 xyplotter - matplotlib/pylab plotting functions
568
569 [Reading files]
570 reader - access rpfits/sdfits files
571 open - attach reader to a file
572 close - detach reader from file
573 read - read in integrations
574 summary - list info about all integrations
575
576 [General]
577 commands - this command
578 print - print details about a variable
579 list_scans - list all scantables created bt the user
580 list_files - list all files readable by asap (default rpf)
581 del - delete the given variable from memory
582 range - create a list of values, e.g.
583 range(3) = [0,1,2], range(2,5) = [2,3,4]
584 help - print help for one of the listed functions
585 execfile - execute an asap script, e.g. execfile('myscript')
586 list_rcparameters - print out a list of possible values to be
587 put into $HOME/.asaprc
588 rc - set rc parameters from within asap
589 mask_and,mask_or,
590 mask_not - boolean operations on masks created with
591 scantable.create_mask
592
593 Note:
594 How to use this with help:
595 # function 'summary'
596 [xxx] is just a category
597 Every 'sub-level' in this list should be replaces by a '.' Period when
598 using help
599 Example:
600 ASAP> help scantable # to get info on ths scantable
601 ASAP> help scantable.summary # to get help on the scantable's
602 ASAP> help average_time
603
604 """
605 if rcParams['verbose']:
606 try:
607 from IPython.genutils import page as pager
608 except ImportError:
609 from pydoc import pager
610 pager(x)
611 else:
612 print x
613 return
614
615def welcome():
616 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
617
618Please report any bugs via:
619http://svn.atnf.csiro.au/trac/asap/simpleticket
620
621[IMPORTANT: ASAP is 0-based]
622Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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