source: trunk/python/__init__.py@ 1377

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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: 2007-07-02 05:23:04 +0000 (Mon, 02 Jul 2007) $'.split()[1]
363__version__ = 'trunk'
364
365def is_ipython():
366 return '__IP' in dir(sys.modules["__main__"])
367if is_ipython():
368 def version(): print "ASAP %s(%s)"% (__version__, __date__)
369 def list_scans(t = scantable):
370 import types
371 globs = sys.modules['__main__'].__dict__.iteritems()
372 print "The user created scantables are:"
373 sts = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
374 print filter(lambda x: not x.startswith('_'), sts)
375 return
376
377 def commands():
378 x = """
379 [The scan container]
380 scantable - a container for integrations/scans
381 (can open asap/rpfits/sdfits and ms files)
382 copy - returns a copy of a scan
383 get_scan - gets a specific scan out of a scantable
384 (by name or number)
385 drop_scan - drops a specific scan out of a scantable
386 (by number)
387 set_selection - set a new subselection of the data
388 get_selection - get the current selection object
389 summary - print info about the scantable contents
390 stats - get specified statistic of the spectra in
391 the scantable
392 stddev - get the standard deviation of the spectra
393 in the scantable
394 get_tsys - get the TSys
395 get_time - get the timestamps of the integrations
396 get_inttime - get the integration time
397 get_sourcename - get the source names of the scans
398 get_azimuth - get the azimuth of the scans
399 get_elevation - get the elevation of the scans
400 get_parangle - get the parallactic angle of the scans
401 get_unit - get the current unit
402 set_unit - set the abcissa unit to be used from this
403 point on
404 get_abcissa - get the abcissa values and name for a given
405 row (time)
406 get_column_names - get the names of the columns in the scantable
407 for use with selector.set_query
408 set_freqframe - set the frame info for the Spectral Axis
409 (e.g. 'LSRK')
410 set_doppler - set the doppler to be used from this point on
411 set_dirframe - set the frame for the direction on the sky
412 set_instrument - set the instrument name
413 set_feedtype - set the feed type
414 get_fluxunit - get the brightness flux unit
415 set_fluxunit - set the brightness flux unit
416 create_mask - return an mask in the current unit
417 for the given region. The specified regions
418 are NOT masked
419 get_restfreqs - get the current list of rest frequencies
420 set_restfreqs - set a list of rest frequencies
421 shift_refpix - shift the reference pixel of the IFs
422 flag - flag selected channels in the data
423 lag_flag - flag specified frequency in the data
424 save - save the scantable to disk as either 'ASAP',
425 'SDFITS' or 'ASCII'
426 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
427 nscan - the number of scans in the scantable
428 nrow - te number of spectra in the scantable
429 history - print the history of the scantable
430 get_fit - get a fit which has been stored witnh the data
431 average_time - return the (weighted) time average of a scan
432 or a list of scans
433 average_pol - average the polarisations together.
434 average_beam - average the beams together.
435 convert_pol - convert to a different polarisation type
436 auto_quotient - return the on/off quotient with
437 automatic detection of the on/off scans (closest
438 in time off is selected)
439 mx_quotient - Form a quotient using MX data (off beams)
440 scale, *, / - return a scan scaled by a given factor
441 add, +, - - return a scan with given value added
442 bin - return a scan with binned channels
443 resample - return a scan with resampled channels
444 smooth - return the spectrally smoothed scan
445 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
446 auto_poly_baseline - automatically fit a polynomial baseline
447 recalc_azel - recalculate azimuth and elevation based on
448 the pointing
449 gain_el - apply gain-elevation correction
450 opacity - apply opacity correction
451 convert_flux - convert to and from Jy and Kelvin brightness
452 units
453 freq_align - align spectra in frequency frame
454 invert_phase - Invert the phase of the cross-correlation
455 swap_linears - Swap XX and YY (or RR LL)
456 rotate_xyphase - rotate XY phase of cross correlation
457 rotate_linpolphase - rotate the phase of the complex
458 polarization O=Q+iU correlation
459 freq_switch - perform frequency switching on the data
460 stats - Determine the specified statistic, e.g. 'min'
461 'max', 'rms' etc.
462 stddev - Determine the standard deviation of the current
463 beam/if/pol
464 [Selection]
465 selector - a selection object to set a subset of a scantable
466 set_scans - set (a list of) scans by index
467 set_cycles - set (a list of) cycles by index
468 set_beams - set (a list of) beamss by index
469 set_ifs - set (a list of) ifs by index
470 set_polarisations - set (a list of) polarisations by name
471 or by index
472 set_names - set a selection by name (wildcards allowed)
473 set_tsys - set a selection by tsys thresholds
474 set_query - set a selection by SQL-like query, e.g. BEAMNO==1
475 ( also get_ functions for all these )
476 reset - unset all selections
477 + - merge two selections
478
479 [Math] Mainly functions which operate on more than one scantable
480
481 average_time - return the (weighted) time average
482 of a list of scans
483 quotient - return the on/off quotient
484 simple_math - simple mathematical operations on two scantables,
485 'add', 'sub', 'mul', 'div'
486 quotient - build quotient of the given on and off scans
487 (matched pairs and 1 off - n on are valid)
488 merge - merge a list of scantables
489
490 [Line Catalog]
491 linecatalog - a linecatalog wrapper, taking an ASCII or
492 internal format table
493 summary - print a summary of the current selection
494 set_name - select a subset by name pattern, e.g. '*OH*'
495 set_strength_limits - select a subset by line strength limits
496 set_frequency_limits - select a subset by frequency limits
497 reset - unset all selections
498 save - save the current subset to a table (internal
499 format)
500 get_row - get the name and frequency from a specific
501 row in the table
502 [Fitting]
503 fitter
504 auto_fit - return a scan where the function is
505 applied to all Beams/IFs/Pols.
506 commit - return a new scan where the fits have been
507 commited.
508 fit - execute the actual fitting process
509 store_fit - store the fit parameters in the data (scantable)
510 get_chi2 - get the Chi^2
511 set_scan - set the scantable to be fit
512 set_function - set the fitting function
513 set_parameters - set the parameters for the function(s), and
514 set if they should be held fixed during fitting
515 set_gauss_parameters - same as above but specialised for individual
516 gaussian components
517 get_parameters - get the fitted parameters
518 plot - plot the resulting fit and/or components and
519 residual
520 [Plotter]
521 asapplotter - a plotter for asap, default plotter is
522 called 'plotter'
523 plot - plot a scantable
524 plot_lines - plot a linecatalog overlay
525 save - save the plot to a file ('png' ,'ps' or 'eps')
526 set_mode - set the state of the plotter, i.e.
527 what is to be plotted 'colour stacked'
528 and what 'panelled'
529 set_selection - only plot a selected part of the data
530 set_range - set a 'zoom' window [xmin,xmax,ymin,ymax]
531 set_legend - specify user labels for the legend indeces
532 set_title - specify user labels for the panel indeces
533 set_abcissa - specify a user label for the abcissa
534 set_ordinate - specify a user label for the ordinate
535 set_layout - specify the multi-panel layout (rows,cols)
536 set_colors - specify a set of colours to use
537 set_linestyles - specify a set of linestyles to use if only
538 using one color
539 set_font - set general font properties, e.g. 'family'
540 set_histogram - plot in historam style
541 set_mask - set a plotting mask for a specific polarization
542 text - draw text annotations either in data or relative
543 coordinates
544 arrow - draw arrow annotations either in data or relative
545 coordinates
546 axhline,axvline - draw horizontal/vertical lines
547 axhspan,axvspan - draw horizontal/vertical regions
548
549 xyplotter - matplotlib/pylab plotting functions
550
551 [Reading files]
552 reader - access rpfits/sdfits files
553 open - attach reader to a file
554 close - detach reader from file
555 read - read in integrations
556 summary - list info about all integrations
557
558 [General]
559 commands - this command
560 print - print details about a variable
561 list_scans - list all scantables created bt the user
562 list_files - list all files readable by asap (default rpf)
563 del - delete the given variable from memory
564 range - create a list of values, e.g.
565 range(3) = [0,1,2], range(2,5) = [2,3,4]
566 help - print help for one of the listed functions
567 execfile - execute an asap script, e.g. execfile('myscript')
568 list_rcparameters - print out a list of possible values to be
569 put into $HOME/.asaprc
570 rc - set rc parameters from within asap
571 mask_and,mask_or,
572 mask_not - boolean operations on masks created with
573 scantable.create_mask
574
575 Note:
576 How to use this with help:
577 # function 'summary'
578 [xxx] is just a category
579 Every 'sub-level' in this list should be replaces by a '.' Period when
580 using help
581 Example:
582 ASAP> help scantable # to get info on ths scantable
583 ASAP> help scantable.summary # to get help on the scantable's
584 ASAP> help average_time
585
586 """
587 if rcParams['verbose']:
588 try:
589 from IPython.genutils import page as pager
590 except ImportError:
591 from pydoc import pager
592 pager(x)
593 else:
594 print x
595 return
596
597def welcome():
598 return """Welcome to ASAP v%s (%s) - the ATNF Spectral Analysis Package
599
600Please report any bugs via:
601http://svn.atnf.csiro.au/trac/asap/newticket
602
603[IMPORTANT: ASAP is 0-based]
604Type commands() to get a list of all available ASAP commands.""" % (__version__, __date__)
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