source: branches/alma/python/__init__.py@ 1492

Last change on this file since 1492 was 1460, checked in by Kana Sugimoto, 16 years ago

New Development: Yes

JIRA Issue: Yes (CAS-1080)

Ready to Release: Yes

Interface Changes: Yes

What Interface Changed: This is a brand new module.

Test Programs:

#from ASAP
scan=scantable('A_FILE_NAME') # Read spectral data from 'A_FILE_NAME'.
new_mask=interactivemask() # Create a interactive masking object
new_mask.select_mask(scan) # Do interactive mask selection
mask=new_mask.get_mask() # Get a final channel mask

Put in Release Notes: No

Description:

The class for interactive mask selection, 'interactivemask', is used
to hard coded in CASA tasks 'sdbaseline' and 'sdstat'.
I moved the class from the tasks and defined as a new ASAP module.


  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 23.0 KB
Line 
1"""
2This is the ATNF Single Dish Analysis package.
3
4"""
5import os,sys,shutil, platform
6
7# Set up CASAPATH 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 CASAPATH if defined and "data" dir present
25if not os.environ.has_key("CASAPATH") or \
26 not os.path.exists(os.environ["CASAPATH"].split()[0]+"/data"):
27 os.environ["CASAPATH"] = "%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
350from interactivemask import interactivemask
351
352if rcParams['useplotter']:
353 try:
354 from asapplotter import asapplotter
355 gui = os.environ.has_key('DISPLAY') and rcParams['plotter.gui']
356 if gui:
357 import pylab as xyplotter
358 plotter = asapplotter(gui)
359 del gui
360 except ImportError:
361 print "Matplotlib not installed. No plotting available"
362
363__date__ = '$Date: 2008-12-18 08:36:57 +0000 (Thu, 18 Dec 2008) $'.split()[1]
364__version__ = '2.2.0 alma'
365# nrao casapy specific, get revision number
366__revision__ = ' unknown '
367casapath=os.environ["CASAPATH"].split()
368revinfo=casapath[0]+'/'+casapath[1]+'/python/2.5/asap/svninfo.txt'
369if os.path.isfile(revinfo):
370 f = file(revinfo)
371 f.readline()
372 revsionno=f.readline()
373 f.close()
374 __revision__ = revsionno.rstrip()
375
376def is_ipython():
377 return '__IP' in dir(sys.modules["__main__"])
378if is_ipython():
379 def version(): print "ASAP %s(%s)"% (__version__, __date__)
380 def list_scans(t = scantable):
381 import types
382 globs = sys.modules['__main__'].__dict__.iteritems()
383 print "The user created scantables are:"
384 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
385 print filter(lambda x: not x.startswith('_'), sts)
386 return
387
388 def commands():
389 x = """
390 [The scan container]
391 scantable - a container for integrations/scans
392 (can open asap/rpfits/sdfits and ms files)
393 copy - returns a copy of a scan
394 get_scan - gets a specific scan out of a scantable
395 (by name or number)
396 drop_scan - drops a specific scan out of a scantable
397 (by number)
398 set_selection - set a new subselection of the data
399 get_selection - get the current selection object
400 summary - print info about the scantable contents
401 stats - get specified statistic of the spectra in
402 the scantable
403 stddev - get the standard deviation of the spectra
404 in the scantable
405 get_tsys - get the TSys
406 get_time - get the timestamps of the integrations
407 get_inttime - get the integration time
408 get_sourcename - get the source names of the scans
409 get_azimuth - get the azimuth of the scans
410 get_elevation - get the elevation of the scans
411 get_parangle - get the parallactic angle of the scans
412 get_unit - get the current unit
413 set_unit - set the abcissa unit to be used from this
414 point on
415 get_abcissa - get the abcissa values and name for a given
416 row (time)
417 get_column_names - get the names of the columns in the scantable
418 for use with selector.set_query
419 set_freqframe - set the frame info for the Spectral Axis
420 (e.g. 'LSRK')
421 set_doppler - set the doppler to be used from this point on
422 set_dirframe - set the frame for the direction on the sky
423 set_instrument - set the instrument name
424 set_feedtype - set the feed type
425 get_fluxunit - get the brightness flux unit
426 set_fluxunit - set the brightness flux unit
427 create_mask - return an mask in the current unit
428 for the given region. The specified regions
429 are NOT masked
430 get_restfreqs - get the current list of rest frequencies
431 set_restfreqs - set a list of rest frequencies
432 shift_refpix - shift the reference pixel of the IFs
433 flag - flag selected channels in the data
434 lag_flag - flag specified frequency in the data
435 save - save the scantable to disk as either 'ASAP',
436 'SDFITS' or 'ASCII'
437 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
438 nscan - the number of scans in the scantable
439 nrow - te number of spectra in the scantable
440 history - print the history of the scantable
441 get_fit - get a fit which has been stored witnh the data
442 average_time - return the (weighted) time average of a scan
443 or a list of scans
444 average_pol - average the polarisations together.
445 average_beam - average the beams together.
446 convert_pol - convert to a different polarisation type
447 auto_quotient - return the on/off quotient with
448 automatic detection of the on/off scans (closest
449 in time off is selected)
450 mx_quotient - Form a quotient using MX data (off beams)
451 scale, *, / - return a scan scaled by a given factor
452 add, +, - - return a scan with given value added
453 bin - return a scan with binned channels
454 resample - return a scan with resampled channels
455 smooth - return the spectrally smoothed scan
456 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
457 auto_poly_baseline - automatically fit a polynomial baseline
458 recalc_azel - recalculate azimuth and elevation based on
459 the pointing
460 gain_el - apply gain-elevation correction
461 opacity - apply opacity correction
462 convert_flux - convert to and from Jy and Kelvin brightness
463 units
464 freq_align - align spectra in frequency frame
465 invert_phase - Invert the phase of the cross-correlation
466 swap_linears - Swap XX and YY (or RR LL)
467 rotate_xyphase - rotate XY phase of cross correlation
468 rotate_linpolphase - rotate the phase of the complex
469 polarization O=Q+iU correlation
470 freq_switch - perform frequency switching on the data
471 stats - Determine the specified statistic, e.g. 'min'
472 'max', 'rms' etc.
473 stddev - Determine the standard deviation of the current
474 beam/if/pol
475 [Selection]
476 selector - a selection object to set a subset of a scantable
477 set_scans - set (a list of) scans by index
478 set_cycles - set (a list of) cycles by index
479 set_beams - set (a list of) beamss by index
480 set_ifs - set (a list of) ifs by index
481 set_polarisations - set (a list of) polarisations by name
482 or by index
483 set_names - set a selection by name (wildcards allowed)
484 set_tsys - set a selection by tsys thresholds
485 set_query - set a selection by SQL-like query, e.g. BEAMNO==1
486 ( also get_ functions for all these )
487 reset - unset all selections
488 + - merge two selections
489
490 [Math] Mainly functions which operate on more than one scantable
491
492 average_time - return the (weighted) time average
493 of a list of scans
494 quotient - return the on/off quotient
495 simple_math - simple mathematical operations on two scantables,
496 'add', 'sub', 'mul', 'div'
497 quotient - build quotient of the given on and off scans
498 (matched pairs and 1 off - n on are valid)
499 merge - merge a list of scantables
500
501 [Line Catalog]
502 linecatalog - a linecatalog wrapper, taking an ASCII or
503 internal format table
504 summary - print a summary of the current selection
505 set_name - select a subset by name pattern, e.g. '*OH*'
506 set_strength_limits - select a subset by line strength limits
507 set_frequency_limits - select a subset by frequency limits
508 reset - unset all selections
509 save - save the current subset to a table (internal
510 format)
511 get_row - get the name and frequency from a specific
512 row in the table
513 [Fitting]
514 fitter
515 auto_fit - return a scan where the function is
516 applied to all Beams/IFs/Pols.
517 commit - return a new scan where the fits have been
518 commited.
519 fit - execute the actual fitting process
520 store_fit - store the fit parameters in the data (scantable)
521 get_chi2 - get the Chi^2
522 set_scan - set the scantable to be fit
523 set_function - set the fitting function
524 set_parameters - set the parameters for the function(s), and
525 set if they should be held fixed during fitting
526 set_gauss_parameters - same as above but specialised for individual
527 gaussian components
528 get_parameters - get the fitted parameters
529 plot - plot the resulting fit and/or components and
530 residual
531 [Plotter]
532 asapplotter - a plotter for asap, default plotter is
533 called 'plotter'
534 plot - plot a scantable
535 plot_lines - plot a linecatalog overlay
536 save - save the plot to a file ('png' ,'ps' or 'eps')
537 set_mode - set the state of the plotter, i.e.
538 what is to be plotted 'colour stacked'
539 and what 'panelled'
540 set_selection - only plot a selected part of the data
541 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
542 set_legend - specify user labels for the legend indeces
543 set_title - specify user labels for the panel indeces
544 set_abcissa - specify a user label for the abcissa
545 set_ordinate - specify a user label for the ordinate
546 set_layout - specify the multi-panel layout (rows,cols)
547 set_colors - specify a set of colours to use
548 set_linestyles - specify a set of linestyles to use if only
549 using one color
550 set_font - set general font properties, e.g. 'family'
551 set_histogram - plot in historam style
552 set_mask - set a plotting mask for a specific polarization
553 text - draw text annotations either in data or relative
554 coordinates
555 arrow - draw arrow annotations either in data or relative
556 coordinates
557 axhline,axvline - draw horizontal/vertical lines
558 axhspan,axvspan - draw horizontal/vertical regions
559
560 xyplotter - matplotlib/pylab plotting functions
561
562 [Reading files]
563 reader - access rpfits/sdfits files
564 open - attach reader to a file
565 close - detach reader from file
566 read - read in integrations
567 summary - list info about all integrations
568
569 [General]
570 commands - this command
571 print - print details about a variable
572 list_scans - list all scantables created bt the user
573 list_files - list all files readable by asap (default rpf)
574 del - delete the given variable from memory
575 range - create a list of values, e.g.
576 range(3) = [0,1,2], range(2,5) = [2,3,4]
577 help - print help for one of the listed functions
578 execfile - execute an asap script, e.g. execfile('myscript')
579 list_rcparameters - print out a list of possible values to be
580 put into $HOME/.asaprc
581 rc - set rc parameters from within asap
582 mask_and,mask_or,
583 mask_not - boolean operations on masks created with
584 scantable.create_mask
585
586 Note:
587 How to use this with help:
588 # function 'summary'
589 [xxx] is just a category
590 Every 'sub-level' in this list should be replaces by a '.' Period when
591 using help
592 Example:
593 ASAP> help scantable # to get info on ths scantable
594 ASAP> help scantable.summary # to get help on the scantable's
595 ASAP> help average_time
596
597 """
598 if rcParams['verbose']:
599 try:
600 from IPython.genutils import page as pager
601 except ImportError:
602 from pydoc import pager
603 pager(x)
604 else:
605 print x
606 return
607
608def welcome():
609 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
610
611Please report any bugs via:
612http://svn.atnf.csiro.au/trac/asap/simpleticket
613
614[IMPORTANT: ASAP is 0-based]
615Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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