source: trunk/python/__init__.py@ 271

Last change on this file since 271 was 255, checked in by mar637, 20 years ago

*lots of renaming

  • added list_rcparameters

selection -> cursor

  • version number 0.1->0.2
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 12.4 KB
Line 
1"""
2This is the ATNF Single Dish Analysis package.
3
4"""
5import os,sys
6
7def validate_bool(b):
8 'Convert b to a boolean or raise'
9 bl = b.lower()
10 if bl in ('f', 'no', 'false', '0', 0): return False
11 elif bl in ('t', 'yes', 'true', '1', 1): return True
12 else:
13 raise ValueError('Could not convert "%s" to boolean' % b)
14
15def validate_int(s):
16 'convert s to int or raise'
17 try: return int(s)
18 except ValueError:
19 raise ValueError('Could not convert "%s" to int' % s)
20
21def asap_fname():
22 """
23 Return the path to the rc file
24
25 Search order:
26
27 * current working dir
28 * environ var ASAPRC
29 * HOME/.matplotlibrc
30
31 """
32
33 fname = os.path.join( os.getcwd(), '.asaprc')
34 if os.path.exists(fname): return fname
35
36 if os.environ.has_key('ASAPRC'):
37 path = os.environ['ASAPRC']
38 if os.path.exists(path):
39 fname = os.path.join(path, '.asaprc')
40 if os.path.exists(fname):
41 return fname
42
43 if os.environ.has_key('HOME'):
44 home = os.environ['HOME']
45 fname = os.path.join(home, '.asaprc')
46 if os.path.exists(fname):
47 return fname
48 return None
49
50
51defaultParams = {
52 # general
53 'verbose' : [True, validate_bool],
54 'useplotter' : [True, validate_bool],
55 'insitu' : [False, validate_bool],
56
57 # plotting
58 'plotter.stacking' : ['p', str],
59 'plotter.panelling' : ['s', str],
60
61 # scantable
62 'scantable.save' : ['ASAP', str],
63 'scantable.autoaverage' : [True, validate_bool],
64 'scantable.freqframe' : ['LSRK', str], #default frequency frame
65 'scantable.allaxes' : [True, validate_bool], # apply action to all axes
66 'scantable.plotter' : [True, validate_bool], # use internal plotter
67
68 # fitter
69 }
70
71def list_rcparameters():
72
73 print """
74 # general
75 # print verbose output
76 'verbose' : True
77
78 # preload a default plotter
79 'useplotter' : True
80
81 # apply operations on the input scantable or return new one
82 'insitu' : False
83
84 # plotting
85 # default mode for colour stacking
86 'plotter.stacking' : 'Pol'
87
88 # default mode for panelling
89 'plotter.panelling' : 'scan'
90
91 # scantable
92 # default ouput format when saving
93 'scantable.save' : 'ASAP'
94 # auto averaging on read
95 'scantable.autoaverage' : True
96
97 # default frequency frame to set when function
98 # scantable.set_freqfrmae is called
99 'scantable.freqframe' : 'LSRK'
100
101 # apply action to all axes not just the cursor location
102 'scantable.allaxes' : True
103
104 # use internal plotter
105 'scantable.plotter' : True
106
107 # Fitter
108 """
109
110def rc_params():
111 'Return the default params updated from the values in the rc file'
112
113 fname = asap_fname()
114
115 if fname is None or not os.path.exists(fname):
116 message = 'could not find rc file; returning defaults'
117 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
118 #print message
119 return ret
120
121 cnt = 0
122 for line in file(fname):
123 cnt +=1
124 line = line.strip()
125 if not len(line): continue
126 if line.startswith('#'): continue
127 tup = line.split(':',1)
128 if len(tup) !=2:
129 print ('Illegal line #%d\n\t%s\n\tin file "%s"' % (cnt, line, fname))
130 continue
131
132 key, val = tup
133 key = key.strip()
134 if not defaultParams.has_key(key):
135 print ('Bad key "%s" on line %d in %s' % (key, cnt, fname))
136 continue
137
138 default, converter = defaultParams[key]
139
140 ind = val.find('#')
141 if ind>=0: val = val[:ind] # ignore trailing comments
142 val = val.strip()
143 try: cval = converter(val) # try to convert to proper type or raise
144 except Exception, msg:
145 print ('Bad val "%s" on line #%d\n\t"%s"\n\tin file "%s"\n\t%s' % (val, cnt, line, fname, msg))
146 continue
147 else:
148 # Alles Klar, update dict
149 defaultParams[key][0] = cval
150
151 # strip the conveter funcs and return
152 ret = dict([ (key, tup[0]) for key, tup in defaultParams.items()])
153 print 'Using rc file %s'%fname
154
155 return ret
156
157
158# this is the instance used by the asap classes
159rcParams = rc_params()
160
161rcParamsDefault = dict(rcParams.items()) # a copy
162
163def rc(group, **kwargs):
164 """
165 Set the current rc params. Group is the grouping for the rc, eg
166 for lines.linewidth the group is 'lines', for axes.facecolor, the
167 group is 'axes', and so on. kwargs is a list of attribute
168 name/value pairs, eg
169
170 rc('lines', linewidth=2, color='r')
171
172 sets the current rc params and is equivalent to
173
174 rcParams['lines.linewidth'] = 2
175 rcParams['lines.color'] = 'r'
176
177
178 Note you can use python's kwargs dictionary facility to store
179 dictionaries of default parameters. Eg, you can customize the
180 font rc as follows
181
182 font = {'family' : 'monospace',
183 'weight' : 'bold',
184 'size' : 'larger',
185 }
186
187 rc('font', **font) # pass in the font dict as kwargs
188
189 This enables you to easily switch between several configurations.
190 Use rcdefaults to restore the default rc params after changes.
191 """
192
193 aliases = {
194 }
195
196 for k,v in kwargs.items():
197 name = aliases.get(k) or k
198 key = '%s.%s' % (group, name)
199 if not rcParams.has_key(key):
200 raise KeyError('Unrecognized key "%s" for group "%s" and name "%s"' % (key, group, name))
201
202 rcParams[key] = v
203
204
205def rcdefaults():
206 """
207 Restore the default rc params - the ones that were created at
208 asap load time
209 """
210 rcParams.update(rcParamsDefault)
211
212from asapfitter import *
213from asapreader import reader
214from asapmath import *
215from scantable import *
216if rcParams['useplotter']:
217 print "Initialising plotter..."
218 import asapplotter
219 plotter = asapplotter.asapplotter()
220
221__date__ = '$Date: 2005-01-21 11:22:46 +0000 (Fri, 21 Jan 2005) $'
222__version__ = '0.2a'
223
224def list_scans(t = scantable):
225 import sys, types
226 #meta_t = type(t)
227 #if meta_t == types.InstanceType:
228 # t = t.__class__
229 #elif meta_t not in [types.ClassType, types.TypeType]:
230 # t = meta_t
231 globs = sys.modules['__main__'].__dict__.iteritems()
232 print "The user created scantables are:"
233 x = map(lambda x: x[0], filter(lambda x: isinstance(x[1], t), globs))
234 print x
235
236def commands():
237 x = """
238 [The scan container]
239 scantable - a container for integrations/scans
240 (can open asap/rpfits/sdfits and ms files)
241 copy - returns a copy of a scan
242 get_scan - gets a specific scan out of a scantable
243 summary - print info about the scantable contents
244 set_cursor - set a specific Beam/IF/Pol 'cursor' for
245 further use
246 get_cursor - print out the current cursor position
247 stats - get specified statistic of the spectra in
248 the scantable
249 stddev - get the standard deviation of the spectra
250 in the scantable
251 get_tsys - get the TSys
252 get_time - get the timestamps of the integrations
253 get_unit - get the currnt unit
254 set_unit - set the unit to be used from this point on
255 get_abcissa - get the abcissa values and name for a given
256 row (time)
257 set_freqframe - set the frame info for the Spectral Axis
258 (e.g. 'LSRK')
259 set_instrument - set the instrument name
260 get_fluxunit - get the brightness flux unit
261 set_fluxunit - set the brightness flux unit
262 create_mask - return an mask in the current unit
263 for the given region. The specified regions
264 are NOT masked
265 get_restfreqs - get the current list of rest frequencies
266 set_restfreqs - set a list of rest frequencies
267 flag_spectrum - flag a whole Beam/IF/Pol
268 save - save the scantable to disk as either 'ASAP'
269 or 'SDFITS'
270 nbeam,nif,nchan,npol - the number of beams/IFs/Pols/Chans
271 [Math]
272 average_time - return the (weighted) time average of a scan
273 or a list of scans
274 average_pol - average the polarisations together.
275 The dimension won't be reduced and
276 all polarisations will contain the
277 averaged spectrum.
278 quotient - return the on/off quotient
279 simple_math - simple mathematical operations on two scantables,
280 'add', 'sub', 'mul', 'div'
281 scale - returns a scan scaled by a given factor
282 add - returns a scan with given value added
283 bin - return a scan with binned channels
284 smooth - return the spectrally smoothed scan
285 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols
286 gain_el - apply gain-elevation correction
287 opacity - apply opacity correction
288 convert_flux - convert to and from Jy and Kelvin brightness
289 units
290
291 fitter
292 auto_fit - return a scan where the function is
293 applied to all Beams/IFs/Pols.
294 commit - return a new scan where the fits have been
295 commited.
296 fit - execute the actual fitting process
297 get_chi2 - get the Chi^2
298 set_scan - set the scantable to be fit
299 set_function - set the fitting function
300 set_parameters - set the parameters for the function(s), and
301 set if they should be held fixed during fitting
302 get_parameters - get the fitted parameters
303 [Plotter]
304 asapplotter - a plotter for asap, default plotter is
305 called 'plotter'
306 plot - plot a (list of) scantable
307 set_mode - set the state of the plotter, i.e.
308 what is to be plotted 'colour stacked'
309 and what 'panelled'
310 set_range - set the abcissa 'zoom' range
311 set_legend - specify user labels for the legend indeces
312 set_title - specify user labels for the panel indeces
313 set_ordinate - specify a user label for the ordinate
314 set_abcissa - specify a user label for the abcissa
315
316 [Reading files]
317 reader - access rpfits/sdfits files
318 read - read in integrations
319 summary - list info about all integrations
320
321 [General]
322 commands - this command
323 print - print details about a variable
324 list_scans - list all scantables created bt the user
325 del - delete the given variable from memory
326 range - create a list of values, e.g.
327 range(3) = [0,1,2], range(2,5) = [2,3,4]
328 help - print help for one of the listed functions
329 execfile - execute an asap script, e.g. execfile('myscript')
330 list_rcparameters - print out a list of possible values to be
331 put into .asaprc
332 Note:
333 How to use this with help:
334 # function 'summary'
335 [xxx] is just a category
336 Every 'sub-level' in this list should be replaces by a '.' Period when
337 using help
338 Example:
339 ASAP> help scantable # to get info on ths scantable
340 ASAP> help scantable.summary # to get help on the scantable's
341 ASAP> help average_time
342
343 """
344 print x
345 return
346
347print """Welcome to ASAP - the ATNF Single Dish Analysis Package
348This is a testing pre-release v0.1a
349
350Please report any bugs to:
351Malte.Marquarding@csiro.au
352
353[NOTE: ASAP is 0-based]
354Type commands() to get a list of all available ASAP commands.
355"""
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