fitting.py @ fb8daaaf

ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalccostrafo411magnetic_scattrelease-4.1.1release-4.1.2release-4.2.2release_4.0.1ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload

Last change on this file since fb8daaaf was fb8daaaf, checked in by Gervaise Alina <gervyh@…>, 15 years ago
plotting with smearing fixed
Property mode set to `100644`
File size: 41.3 KB

Line
1	import re
2	import sys, wx, logging
3	import string, numpy, math
4
5	#import copy,deepcopy
6	from danse.common.plottools.plottables import Data1D, Theory1D,Data2D
7	from danse.common.plottools.PlotPanel import PlotPanel
8	from sans.guicomm.events import NewPlotEvent, StatusEvent
9	from sans.guicomm.events import EVT_SLICER_PANEL,ERR_DATA
10
11	from sans.fit.AbstractFitEngine import Model,FitData1D,FitData2D#,Data,
12	from fitproblem import FitProblem
13	from fitpanel import FitPanel
14	from fit_thread import FitThread
15	import models
16	import fitpage
17
18	DEFAULT_BEAM = 0.005
19	DEFAULT_QMIN = 0.0
20	DEFAULT_QMAX = 0.1
21	DEFAULT_NPTS = 50
22	import time
23	import thread
24
25
26	(PageInfoEvent, EVT_PAGE_INFO) = wx.lib.newevent.NewEvent()
27	class PlotInfo:
28	"""
29	store some plotting field
30	"""
31	_xunit = 'A^{-1}'
32	_xaxis= "\\rm{Q}"
33	_yunit = "cm^{-1}"
34	_yaxis= "\\rm{Intensity} "
35	id = "Model"
36	group_id = "Model"
37	title= None
38	info= None
39
40
41	class Plugin:
42	"""
43	Fitting plugin is used to perform fit
44	"""
45	def __init__(self):
46	## Plug-in name
47	self.sub_menu = "Fitting"
48
49	## Reference to the parent window
50	self.parent = None
51	#Provide list of models existing in the application
52	self.menu_mng = models.ModelManager()
53	## List of panels for the simulation perspective (names)
54	self.perspective = []
55	#list of panel to send to guiframe
56	self.mypanels=[]
57	# reference to the current running thread
58	self.calc_2D= None
59	self.calc_1D= None
60	self.calc_fit= None
61
62	# Start with a good default
63	self.elapsed = 0.022
64	# the type of optimizer selected, park or scipy
65	self.fitter = None
66	#Flag to let the plug-in know that it is running stand alone
67	self.standalone=True
68	## dictionary of page closed and id
69	self.closed_page_dict ={}
70	## Fit engine
71	self._fit_engine = 'scipy'
72	#List of selected data
73	self.selected_data_list=[]
74	# Log startup
75	logging.info("Fitting plug-in started")
76	# model 2D view
77	self.model2D_id=None
78	#keep reference of the simultaneous fit page
79	self.sim_page=None
80	#dictionary containing data name and error on dy of that data
81	self.err_dy={}
82
83
84
85	def populate_menu(self, id, owner):
86	"""
87	Create a menu for the Fitting plug-in
88	@param id: id to create a menu
89	@param owner: owner of menu
90	@ return : list of information to populate the main menu
91	"""
92	#Menu for fitting
93	self.menu1 = wx.Menu()
94
95	#Set park engine
96	id3 = wx.NewId()
97	scipy_help= "Scipy Engine: Perform Simple fit. More in Help window...."
98	self.menu1.AppendCheckItem(id3, "Simple Fit [Scipy]",scipy_help)
99	wx.EVT_MENU(owner, id3, self._onset_engine_scipy)
100
101	id3 = wx.NewId()
102	park_help = "Park Engine: Perform Complex fit. More in Help window...."
103	self.menu1.AppendCheckItem(id3, "Complex Fit [Park]",park_help)
104	wx.EVT_MENU(owner, id3, self._onset_engine_park)
105
106	self.menu1.FindItemByPosition(0).Check(True)
107	self.menu1.FindItemByPosition(1).Check(False)
108
109	self.menu1.AppendSeparator()
110
111	id1 = wx.NewId()
112	simul_help = "Allow to edit fit engine with multiple model and data"
113	self.menu1.Append(id1, '&Simultaneous Page',simul_help)
114	wx.EVT_MENU(owner, id1, self.on_add_sim_page)
115
116	#menu for model
117	menu2 = wx.Menu()
118
119	self.menu_mng.populate_menu(menu2, owner)
120	id2 = wx.NewId()
121	owner.Bind(models.EVT_MODEL,self._on_model_menu)
122
123	self.fit_panel.set_owner(owner)
124	self.fit_panel.set_model_list(self.menu_mng.get_model_list())
125	owner.Bind(fitpage.EVT_MODEL_BOX,self._on_model_panel)
126
127	self.menu3= wx.Menu()
128	id4 = wx.NewId()
129
130	#create menubar items
131	return [(id, self.menu1, "Fitting"),
132	(id4,self.menu3,"Averagers"),
133	(id2, menu2, "Model")]
134
135	def on_add_sim_page(self, event):
136	"""
137	Create a page to access simultaneous fit option
138	"""
139	if self.sim_page !=None:
140	msg= "Simultaneous Fit page already opened"
141	wx.PostEvent(self.parent, StatusEvent(status= msg))
142	return
143
144	self.sim_page= self.fit_panel.add_sim_page()
145
146
147
148	def help(self, evt):
149	"""
150	Show a general help dialog.
151	TODO: replace the text with a nice image
152	"""
153	from helpPanel import HelpWindow
154	frame = HelpWindow(None, -1, 'HelpWindow')
155	frame.Show(True)
156
157
158	def get_context_menu(self, graph=None):
159	"""
160	Get the context menu items available for P(r)
161	@param graph: the Graph object to which we attach the context menu
162	@return: a list of menu items with call-back function
163	"""
164	self.graph=graph
165	for item in graph.plottables:
166	if item.__class__.__name__ is "Data2D":
167	return [["Select data for Fitting",\
168	"Dialog with fitting parameters ", self._onSelect]]
169	else:
170
171	if item.name==graph.selected_plottable :
172	if not hasattr(item, "group_id"):
173	return []
174	return [["Select data for Fitting", \
175	"Dialog with fitting parameters ", self._onSelect]]
176	return []
177
178
179	def get_panels(self, parent):
180	"""
181	Create and return a list of panel objects
182	"""
183	self.parent = parent
184	# Creation of the fit panel
185	self.fit_panel = FitPanel(self.parent, -1)
186	#Set the manager for the main panel
187	self.fit_panel.set_manager(self)
188	# List of windows used for the perspective
189	self.perspective = []
190	self.perspective.append(self.fit_panel.window_name)
191	# take care of saving data, model and page associated with each other
192	self.page_finder = {}
193	#index number to create random model name
194	self.index_model = 0
195	self.index_theory= 0
196	self.parent.Bind(EVT_SLICER_PANEL, self._on_slicer_event)
197	self.parent.Bind( ERR_DATA, self._on_data_error)
198
199	#Send the fitting panel to guiframe
200	self.mypanels.append(self.fit_panel)
201	return self.mypanels
202
203
204
205	def get_perspective(self):
206	"""
207	Get the list of panel names for this perspective
208	"""
209	return self.perspective
210
211
212	def on_perspective(self, event):
213	"""
214	Call back function for the perspective menu item.
215	We notify the parent window that the perspective
216	has changed.
217	"""
218	self.parent.set_perspective(self.perspective)
219
220
221	def post_init(self):
222	"""
223	Post initialization call back to close the loose ends
224	[Somehow openGL needs this call]
225	"""
226	self.parent.set_perspective(self.perspective)
227
228
229	def copy_data(self, item, dy):
230	"""
231	receive a data 1D and the list of errors on dy
232	and create a new data1D data
233	@param return
234	"""
235	detector=None
236	source=None
237	info = None
238	id=None
239	dxl=None
240	dxw=None
241	if hasattr(item, "dxl"):
242	dxl = item.dxl
243	if hasattr(item, "dxw"):
244	dxw = item.dxw
245	if hasattr(item, "detector"):
246	detector =item.detector
247	if hasattr(item, "source"):
248	source =item.source
249	if hasattr(item ,"info"):
250	info= item.info
251	if hasattr(item,"id"):
252	id = item.id
253	from sans.guiframe import dataFitting
254	if item.__class__.__name__=="Data1D":
255	data= dataFitting.Data1D(x=item.x, y=item.y, dy=dy, dxl=dxl, dxw=dxw)
256	else:
257	data= dataFitting.Theory1D(x=item.x, y=item.y, dxl=dxl, dxw=dxw)
258	data.name = item.name
259	data.detector = detector
260	data.source = source
261	## allow to highlight data when plotted
262	data.interactive = item.interactive
263	## when 2 data have the same id override the 1 st plotted
264	data.id = id
265	## info is a reference to output of dataloader that can be used
266	## to save data 1D as cansas xml file
267	data.info= info
268	## If the data file does not tell us what the axes are, just assume...
269	data.xaxis(item._xaxis,item._xunit)
270	data.yaxis(item._yaxis,item._yunit)
271	##group_id specify on which panel to plot this data
272	data.group_id = item.group_id
273	return data
274
275	def set_fit_range(self, page, qmin, qmax):
276	"""
277	Set the fitting range of a given page
278	"""
279	if page in self.page_finder.iterkeys():
280	fitproblem= self.page_finder[page]
281	fitproblem.set_range(qmin= qmin, qmax= qmax)
282
283	def schedule_for_fit(self,value=0,page=None,fitproblem =None):
284	"""
285	Set the fit problem field to 0 or 1 to schedule that problem to fit.
286	Schedule the specified fitproblem or get the fit problem related to
287	the current page and set value.
288	@param value : integer 0 or 1
289	@param fitproblem: fitproblem to schedule or not to fit
290	"""
291	if fitproblem !=None:
292	fitproblem.schedule_tofit(value)
293	else:
294	if page in self.page_finder.iterkeys():
295	fitproblem= self.page_finder[page]
296	fitproblem.schedule_tofit(value)
297
298
299
300	def get_page_finder(self):
301	""" @return self.page_finder used also by simfitpage.py"""
302	return self.page_finder
303
304
305	def set_page_finder(self,modelname,names,values):
306	"""
307	Used by simfitpage.py to reset a parameter given the string constrainst.
308	@param modelname: the name ot the model for with the parameter has to reset
309	@param value: can be a string in this case.
310	@param names: the paramter name
311	@note: expecting park used for fit.
312	"""
313	sim_page= self.sim_page
314	for page, value in self.page_finder.iteritems():
315	if page != sim_page:
316	list=value.get_model()
317	model = list[0]
318	if model.name== modelname:
319	value.set_model_param(names,values)
320	break
321
322
323
324	def split_string(self,item):
325	"""
326	receive a word containing dot and split it. used to split parameterset
327	name into model name and parameter name example:
328	paramaterset (item) = M1.A
329	@return model_name =M1 , parameter name =A
330	"""
331	if string.find(item,".")!=-1:
332	param_names= re.split("\.",item)
333	model_name=param_names[0]
334	param_name=param_names[1]
335	return model_name,param_name
336
337
338	def stop_fit(self):
339	"""
340	Stop the fit engine
341	"""
342	if self.calc_fit!= None and self.calc_thread.isrunning():
343	self.calc_thread.stop()
344	wx.PostEvent(self.parent, StatusEvent(status="Fitting \
345	is cancelled" , type="stop"))
346
347
348
349	def set_smearer(self,smearer, qmin=None, qmax=None):
350	"""
351	Get a smear object and store it to a fit problem
352	@param smearer: smear object to allow smearing data
353	"""
354	current_pg=self.fit_panel.get_current_page()
355	self.page_finder[current_pg].set_smearer(smearer)
356	## draw model 1D with smeared data
357	data = self.page_finder[current_pg].get_plotted_data()
358	model = self.page_finder[current_pg].get_model()
359	## if user has already selected a model to plot
360	## redraw the model with data smeared
361
362	smearer =self.page_finder[current_pg].get_smearer()
363	self.draw_model( model=model, data= data, smearer= smearer,
364	qmin= qmin, qmax= qmax)
365
366
367
368	def draw_model(self, model, data= None,smearer= None,
369	enable1D= True, enable2D= False,
370	qmin= DEFAULT_QMIN, qmax= DEFAULT_QMAX, qstep= DEFAULT_NPTS):
371	"""
372	Draw model.
373	@param model: the model to draw
374	@param name: the name of the model to draw
375	@param data: the data on which the model is based to be drawn
376	@param description: model's description
377	@param enable1D: if true enable drawing model 1D
378	@param enable2D: if true enable drawing model 2D
379	@param qmin: Range's minimum value to draw model
380	@param qmax: Range's maximum value to draw model
381	@param qstep: number of step to divide the x and y-axis
382
383	"""
384	## draw model 1D with no loaded data
385	self._draw_model1D( model= model, data= data,enable1D=enable1D, smearer= smearer,
386	qmin= qmin, qmax= qmax, qstep= qstep )
387	## draw model 2D with no initial data
388	self._draw_model2D(model=model,
389	data = data,
390	enable2D= enable2D,
391	qmin=qmin,
392	qmax=qmax,
393	qstep=qstep)
394
395
396
397	def onFit(self):
398	"""
399	perform fit
400	"""
401	## count the number of fitproblem schedule to fit
402	fitproblem_count= 0
403	for value in self.page_finder.itervalues():
404	if value.get_scheduled()==1:
405	fitproblem_count += 1
406
407	## if simultaneous fit change automatically the engine to park
408	if fitproblem_count >1:
409	self._on_change_engine(engine='park')
410
411	from sans.fit.Fitting import Fit
412	self.fitter= Fit(self._fit_engine)
413
414	if self._fit_engine=="park":
415	engineType="Simultaneous Fit"
416	else:
417	engineType="Single Fit"
418
419	fproblemId = 0
420	current_pg=None
421	for page, value in self.page_finder.iteritems():
422	try:
423	if value.get_scheduled()==1:
424	#Get list of parameters name to fit
425	pars = []
426	templist = []
427	templist = page.get_param_list()
428	for element in templist:
429	name = str(element[0].GetLabelText())
430	pars.append(name)
431	#Set Engine (model , data) related to the page on
432	self._fit_helper( current_pg=page, value=value,pars=pars,
433	id=fproblemId, title= engineType )
434	fproblemId += 1
435	current_pg= page
436	except:
437	msg= "%s error: %s" % (engineType,sys.exc_value)
438	wx.PostEvent(self.parent, StatusEvent(status= msg ))
439	return
440	#Do the simultaneous fit
441	try:
442	## If a thread is already started, stop it
443	if self.calc_fit!= None and self.calc_fit.isrunning():
444	self.calc_fit.stop()
445	## perform single fit
446	if self._fit_engine=="scipy":
447	qmin, qmax= current_pg.get_range()
448	self.calc_fit=FitThread(parent =self.parent,
449	fn= self.fitter,
450	cpage=current_pg,
451	pars= pars,
452	completefn= self._single_fit_completed,
453	updatefn=None)
454
455	else:
456	## Perform more than 1 fit at the time
457	self.calc_fit=FitThread(parent =self.parent,
458	fn= self.fitter,
459	completefn= self._simul_fit_completed,
460	updatefn=None)
461	self.calc_fit.queue()
462	self.calc_fit.ready(2.5)
463
464	except:
465	msg= "%s error: %s" % (engineType,sys.exc_value)
466	wx.PostEvent(self.parent, StatusEvent(status= msg ))
467	return
468
469
470	def _add_page_onmenu(self, name,fitproblem=None):
471	"""
472	Add name of a closed page of fitpanel in a menu
473	"""
474	list = self.menu1.GetMenuItems()
475	for item in list:
476	if name == item.GetItemLabel():
477	self.closed_page_dict[name][1] = fitproblem
478
479	if not name in self.closed_page_dict.keys():
480	# Post paramters
481	event_id = wx.NewId()
482	self.menu1.Append(event_id, name, "Show %s fit panel" % name)
483	self.closed_page_dict[name]= [event_id, fitproblem]
484	wx.EVT_MENU(self.parent,event_id, self._open_closed_page)
485
486
487	def _open_closed_page(self, event):
488	"""
489	reopen a closed page
490	"""
491	for name, value in self.closed_page_dict.iteritems():
492	if event.GetId() in value:
493	id,fitproblem = value
494	if name !="Model":
495	data= fitproblem.get_fit_data()
496	page = self.fit_panel.add_fit_page(data= data,reset=True)
497	if fitproblem != None:
498	self.page_finder[page]=fitproblem
499	if self.sim_page != None:
500	self.sim_page.draw_page()
501
502	else:
503	model = fitproblem
504	self.fit_panel.add_model_page(model=model, topmenu=True,
505	reset= True)
506	break
507
508
509	def _reset_schedule_problem(self, value=0):
510	"""
511	unschedule or schedule all fitproblem to be fit
512	"""
513	for page, fitproblem in self.page_finder.iteritems():
514	fitproblem.schedule_tofit(value)
515
516	def _fit_helper(self,current_pg,pars,value, id, title="Single Fit " ):
517	"""
518	helper for fitting
519	"""
520	metadata = value.get_fit_data()
521	model = value.get_model()
522	smearer = value.get_smearer()
523	qmin , qmax = value.get_range()
524	self.fit_id =id
525	#Create list of parameters for fitting used
526	templist=[]
527	pars=pars
528	try:
529	## create a park model and reset parameter value if constraint
530	## is given
531	new_model = Model(model)
532	param = value.get_model_param()
533	if len(param)>0:
534	for item in param:
535	param_value = item[1]
536	param_name = item[0]
537	## check if constraint
538	if param_value !=None and param_name != None:
539	new_model.parameterset[ param_name].set( param_value )
540
541	#Do the single fit
542	self.fitter.set_model(new_model, self.fit_id, pars)
543
544	self.fitter.set_data(data=metadata,Uid=self.fit_id,
545	smearer=smearer,qmin= qmin,qmax=qmax )
546
547	self.fitter.select_problem_for_fit(Uid= self.fit_id,
548	value= value.get_scheduled())
549	value.clear_model_param()
550	except:
551	msg= title +" error: %s" % sys.exc_value
552	wx.PostEvent(self.parent, StatusEvent(status= msg ))
553	return
554
555	def _onSelect(self,event):
556	"""
557	when Select data to fit a new page is created .Its reference is
558	added to self.page_finder
559	"""
560	self.panel = event.GetEventObject()
561	for item in self.panel.graph.plottables:
562	if item.name == self.panel.graph.selected_plottable:
563	## put the errors values back to the model if the errors were hiden
564	## before sending them to the fit engine
565	if len(self.err_dy)>0:
566	if item.name in self.err_dy.iterkeys():
567	dy= self.err_dy[item.name]
568	data= self.copy_data(item, dy)
569	else:
570	data= item
571	else:
572	if item.dy==None:
573	dy= numpy.zeros(len(item.y))
574	dy[dy==0]=1
575	data= self.copy_data(item, dy)
576	else:
577	data= item
578	else:
579	data= item
580	## create anew page
581	if item.name == self.panel.graph.selected_plottable or\
582	item.__class__.__name__ is "Data2D":
583	try:
584	page = self.fit_panel.add_fit_page(data)
585	# add data associated to the page created
586	if page !=None:
587	#create a fitproblem storing all link to data,model,page creation
588	self.page_finder[page]= FitProblem()
589	## item is almost the same as data but contains
590	## axis info for plotting
591	self.page_finder[page].add_plotted_data(item)
592	self.page_finder[page].add_fit_data(data)
593
594	wx.PostEvent(self.parent, StatusEvent(status="Page Created"))
595	else:
596	wx.PostEvent(self.parent, StatusEvent(status="Page was already Created"))
597	except:
598	raise
599	#wx.PostEvent(self.parent, StatusEvent(status="Creating Fit page: %s"\
600	#%sys.exc_value))
601	#return
602
603	def _single_fit_completed(self,result,pars,cpage, elapsed=None):
604	"""
605	Display fit result on one page of the notebook.
606	@param result: result of fit
607	@param pars: list of names of parameters fitted
608	@param current_pg: the page where information will be displayed
609	@param qmin: the minimum value of x to replot the model
610	@param qmax: the maximum value of x to replot model
611
612	"""
613	wx.PostEvent(self.parent, StatusEvent(status="Single fit \
614	complete! " , type="stop"))
615	try:
616	for page, value in self.page_finder.iteritems():
617	if page==cpage :
618	model= value.get_model()
619	break
620	i = 0
621	for name in pars:
622	if result.pvec.__class__==numpy.float64:
623	model.setParam(name,result.pvec)
624	else:
625	model.setParam(name,result.pvec[i])
626	i += 1
627	## Reset values of the current page to fit result
628	cpage.onsetValues(result.fitness, result.pvec,result.stderr)
629	## plot the current model with new param
630	metadata = self.page_finder[cpage].get_fit_data()
631	model = self.page_finder[cpage].get_model()
632	qmin, qmax= self.page_finder[cpage].get_range()
633	smearer =self.page_finder[cpage].get_smearer()
634	#Replot models
635	msg= "Single Fit completed. plotting... %s:"%model.name
636	wx.PostEvent(self.parent, StatusEvent(status="%s " % msg))
637	self.draw_model( model=model, data= metadata, smearer= smearer,
638	qmin= qmin, qmax= qmax)
639
640	except:
641	msg= "Single Fit completed but Following error occurred:"
642	wx.PostEvent(self.parent, StatusEvent(status="%s %s" % (msg, sys.exc_value)))
643	return
644
645
646	def _simul_fit_completed(self,result,pars=None,cpage=None, elapsed=None):
647	"""
648	Parameter estimation completed,
649	display the results to the user
650	@param alpha: estimated best alpha
651	@param elapsed: computation time
652	"""
653	wx.PostEvent(self.parent, StatusEvent(status="Simultaneous fit \
654	complete ", type="stop"))
655
656	## fit more than 1 model at the same time
657	try:
658	for page, value in self.page_finder.iteritems():
659	if value.get_scheduled()==1:
660	model = value.get_model()
661	metadata = value.get_plotted_data()
662	small_out = []
663	small_cov = []
664	i = 0
665	#Separate result in to data corresponding to each page
666	for p in result.parameters:
667	model_name,param_name = self.split_string(p.name)
668	if model.name == model_name:
669	p_name= model.name+"."+param_name
670	if p.name == p_name:
671	small_out.append(p.value )
672	model.setParam(param_name,p.value)
673	if p.stderr==None:
674	p.stderr=numpy.nan
675	small_cov.append(p.stderr)
676
677	else:
678	small_cov.append(p.stderr)
679	else:
680	value= model.getParam(param_name)
681	small_out.append(value )
682	small_cov.append(numpy.nan)
683	# Display result on each page
684	page.onsetValues(result.fitness, small_out,small_cov)
685	#Replot models
686	msg= "Simultaneous Fit completed. plotting... %s:"%model.name
687	wx.PostEvent(self.parent, StatusEvent(status="%s " % msg))
688	qmin, qmax= page.get_range()
689	smearer =self.page_finder[page].get_smearer()
690	self.draw_model( model=model, data= metadata, smearer=smearer,
691	qmin= qmin, qmax= qmax)
692
693	except:
694	msg= "Simultaneous Fit completed but Following error occurred: "
695	wx.PostEvent(self.parent, StatusEvent(status="%s%s" %(msg,sys.exc_value)))
696	return
697
698
699
700	def _on_show_panel(self, event):
701	print "_on_show_panel: fitting"
702
703
704	def _onset_engine_park(self,event):
705	"""
706	set engine to park
707	"""
708	self._on_change_engine('park')
709
710
711	def _onset_engine_scipy(self,event):
712	"""
713	set engine to scipy
714	"""
715	self._on_change_engine('scipy')
716
717	def _on_slicer_event(self, event):
718	"""
719	Receive a panel as event and send it to guiframe
720	@param event: event containing a panel
721	"""
722	if event.panel!=None:
723	new_panel = event.panel
724	# Set group ID if available
725	event_id = self.parent.popup_panel(new_panel)
726	self.menu3.Append(event_id, new_panel.window_caption,
727	"Show %s plot panel" % new_panel.window_caption)
728	# Set UID to allow us to reference the panel later
729	new_panel.uid = event_id
730	new_panel
731	self.mypanels.append(new_panel)
732	return
733
734
735	def _return_engine_type(self):
736	"""
737	return the current type of engine
738	"""
739	return self._fit_engine
740
741
742	def _on_change_engine(self, engine='park'):
743	"""
744	Allow to select the type of engine to perform fit
745	@param engine: the key work of the engine
746	"""
747	## saving fit engine name
748	self._fit_engine = engine
749	## change menu item state
750	if engine=="park":
751	self.menu1.FindItemByPosition(0).Check(False)
752	self.menu1.FindItemByPosition(1).Check(True)
753	else:
754	self.menu1.FindItemByPosition(0).Check(True)
755	self.menu1.FindItemByPosition(1).Check(False)
756
757	## post a message to status bar
758	wx.PostEvent(self.parent, StatusEvent(status="Engine set to: %s" % self._fit_engine))
759
760	## Bind every open fit page with a newevent to know the current fitting engine
761	import fitpage
762	event= fitpage.FitterTypeEvent()
763	event.type = self._fit_engine
764	for key in self.page_finder.keys():
765	wx.PostEvent(key, event)
766
767
768	def _on_model_panel(self, evt):
769	"""
770	react to model selection on any combo box or model menu.plot the model
771	@param evt: wx.combobox event
772	"""
773	model = evt.model
774
775	if model ==None:
776	return
777
778	current_pg = self.fit_panel.get_current_page()
779	## make sure nothing is done on self.sim_page
780	## example trying to call set_panel on self.sim_page
781	if current_pg != self.sim_page :
782
783	if self.page_finder[current_pg].get_model()== None :
784
785	model.name="M"+str(self.index_model)
786	self.index_model += 1
787	else:
788	model.name= self.page_finder[current_pg].get_model().name
789
790	metadata = self.page_finder[current_pg].get_plotted_data()
791
792	# save the name containing the data name with the appropriate model
793	self.page_finder[current_pg].set_model(model)
794	qmin, qmax= current_pg.get_range()
795	self.page_finder[current_pg].set_range(qmin=qmin, qmax=qmax)
796
797	# save model name
798	self.draw_model( model=model, data= metadata, qmin=qmin, qmax=qmax)
799
800	if self.sim_page!=None:
801	self.sim_page.draw_page()
802
803
804
805	def _on_model_menu(self, evt):
806	"""
807	Plot a theory from a model selected from the menu
808	@param evt: wx.menu event
809	"""
810	model = evt.model
811
812	# Create a model page. If a new page is created, the model
813	# will be plotted automatically. If a page already exists,
814	# the content will be updated and the plot refreshed
815	self.fit_panel.add_model_page(model,topmenu=True)
816
817
818
819
820	def _update1D(self,x, output):
821	"""
822	Update the output of plotting model 1D
823	"""
824	self.calc_thread.ready(1)
825
826	def _fill_default_model2D(self, theory, qmax,qstep, qmin=None):
827	"""
828	fill Data2D with default value
829	@param theory: Data2D to fill
830	"""
831	from DataLoader.data_info import Detector, Source
832
833	detector = Detector()
834	theory.detector.append(detector)
835
836	theory.detector[0].distance=1e+32
837	theory.source= Source()
838	theory.source.wavelength=2*math.pi/1e+32
839
840	## Create detector for Model 2D
841	xmax=2theory.detector[0].distancemath.atan(\
842	qmax/(4*math.pi/theory.source.wavelength))
843
844	theory.detector[0].pixel_size.x= xmax/(qstep/2-0.5)
845	theory.detector[0].pixel_size.y= xmax/(qstep/2-0.5)
846	theory.detector[0].beam_center.x= qmax
847	theory.detector[0].beam_center.y= qmax
848	## create x_bins and y_bins of the model 2D
849	distance = theory.detector[0].distance
850	pixel = qstep/2-1
851	theta = pixel / distance / qstep#100.0
852	wavelength = theory.source.wavelength
853	pixel_width_x = theory.detector[0].pixel_size.x
854	pixel_width_y = theory.detector[0].pixel_size.y
855	center_x = theory.detector[0].beam_center.x/pixel_width_x
856	center_y = theory.detector[0].beam_center.y/pixel_width_y
857
858
859	size_x, size_y= numpy.shape(theory.data)
860	for i_x in range(size_x):
861	theta = (i_x-center_x)*pixel_width_x / distance
862	qx = 4.0math.pi/wavelength math.tan(theta/2.0)
863	theory.x_bins.append(qx)
864	for i_y in range(size_y):
865	theta = (i_y-center_y)*pixel_width_y / distance
866	qy =4.0math.pi/wavelength math.tan(theta/2.0)
867	theory.y_bins.append(qy)
868
869	theory.group_id ="Model"
870	theory.id ="Model"
871	## determine plot boundaries
872	theory.xmin= -qmax
873	theory.xmax= qmax
874	theory.ymin= -qmax
875	theory.ymax= qmax
876
877
878	def _get_plotting_info(self, data=None):
879	"""
880	get plotting info from data if data !=None
881	else use some default
882	"""
883	my_info = PlotInfo()
884	if data !=None:
885	if hasattr(data,"info"):
886	x_name, x_units = data.get_xaxis()
887	y_name, y_units = data.get_yaxis()
888
889	my_info._xunit = x_units
890	my_info._xaxis = x_name
891	my_info._yunit = y_units
892	my_info._yaxis = y_name
893
894	my_info.title= data.name
895	if hasattr(data, "info"):
896	my_info.info= data.info
897	if hasattr(data, "group_id"):
898	my_info.group_id= data.group_id
899
900	return my_info
901
902	def _complete1D(self, x,y, elapsed,model,data=None):
903	"""
904	Complete plotting 1D data
905	"""
906	try:
907
908	new_plot = Theory1D(x=x, y=y)
909	my_info = self._get_plotting_info( data)
910	new_plot.name = model.name
911	new_plot.id = my_info.id
912	new_plot.group_id = my_info.group_id
913
914	new_plot.xaxis( my_info._xaxis, my_info._xunit)
915	new_plot.yaxis( my_info._yaxis, my_info._yunit)
916	if data!=None:
917	if new_plot.id == data.id:
918	new_plot.id += "Model"
919
920	# Pass the reset flag to let the plotting event handler
921	# know that we are replacing the whole plot
922	title= my_info.title
923	if title== None:
924	title="Analytical model 1D "
925	wx.PostEvent(self.parent, NewPlotEvent(plot=new_plot,
926	title= str(title), reset=True ))
927	else:
928	wx.PostEvent(self.parent, NewPlotEvent(plot=new_plot,
929	title= str(title)))
930
931	except:
932	msg= " Error occurred when drawing %s Model 1D: "%new_plot.name
933	msg+= " %s"%sys.exc_value
934	wx.PostEvent( self.parent, StatusEvent(status= msg ))
935	return
936
937
938
939
940	def _update2D(self, output,time=None):
941	"""
942	Update the output of plotting model
943	"""
944	wx.PostEvent(self.parent, StatusEvent(status="Plot \
945	#updating ... ",type="update"))
946	self.calc_thread.ready(0.01)
947
948
949	def _complete2D(self, image,data, model, elapsed,qmin, qmax,qstep=DEFAULT_NPTS):
950	"""
951	Complete get the result of modelthread and create model 2D
952	that can be plot.
953	"""
954	msg = "Calc complete !"
955	wx.PostEvent( self.parent, StatusEvent( status= msg , type="stop" ))
956
957	err_image = numpy.zeros(numpy.shape(image))
958	err_image[err_image==0]= 1
959	theory= Data2D(image= image , err_image= err_image)
960	theory.name= model.name
961
962	if data ==None:
963	self._fill_default_model2D(theory= theory, qmax=qmax,qstep=qstep, qmin= qmin)
964
965	else:
966	theory.id= "Model"
967	theory.group_id= "Model"+data.name
968	theory.x_bins= data.x_bins
969	theory.y_bins= data.y_bins
970	theory.detector= data.detector
971	theory.source= data.source
972
973	## plot boundaries
974	theory.ymin= data.ymin
975	theory.ymax= data.ymax
976	theory.xmin= data.xmin
977	theory.xmax= data.xmax
978
979	## plot
980	wx.PostEvent(self.parent, NewPlotEvent(plot=theory,
981	title="Analytical model 2D ", reset=True ))
982
983	def _on_data_error(self, event):
984	"""
985	receives and event from plotting plu-gins to store the data name and
986	their errors of y coordinates for 1Data hide and show error
987	"""
988	self.err_dy= event.err_dy
989
990	def _draw_model2D(self,model,data=None,description=None, enable2D=False,
991	qmin=DEFAULT_QMIN, qmax=DEFAULT_QMAX, qstep=DEFAULT_NPTS):
992	"""
993	draw model in 2D
994	@param model: instance of the model to draw
995	@param description: the description of the model
996	@param enable2D: when True allows to draw model 2D
997	@param qmin: the minimum value to draw model 2D
998	@param qmax: the maximum value to draw model 2D
999	@param qstep: the number of division of Qx and Qy of the model to draw
1000
1001	"""
1002
1003	x= numpy.linspace(start= -1*qmax,
1004	stop= qmax,
1005	num= qstep,
1006	endpoint=True )
1007	y = numpy.linspace(start= -1*qmax,
1008	stop= qmax,
1009	num= qstep,
1010	endpoint=True )
1011	## use data info instead
1012	if data !=None:
1013	## check if data2D to plot
1014	if hasattr(data, "x_bins"):
1015	enable2D = True
1016	x= data.x_bins
1017	y= data.y_bins
1018
1019	if not enable2D:
1020	return
1021	try:
1022	from model_thread import Calc2D
1023	## If a thread is already started, stop it
1024	if self.calc_2D != None and self.calc_2D.isrunning():
1025	self.calc_2D.stop()
1026	self.calc_2D = Calc2D( x= x,
1027	y= y,
1028	model= model,
1029	data = data,
1030	qmin= qmin,
1031	qmax= qmax,
1032	qstep= qstep,
1033	completefn= self._complete2D,
1034	updatefn= self._update2D )
1035	self.calc_2D.queue()
1036
1037	except:
1038	msg= " Error occurred when drawing %s Model 2D: "%model.name
1039	msg+= " %s"%sys.exc_value
1040	wx.PostEvent( self.parent, StatusEvent(status= msg ))
1041	return
1042
1043	def _draw_model1D(self, model, data=None, smearer= None,
1044	qmin=DEFAULT_QMIN, qmax=DEFAULT_QMAX, qstep= DEFAULT_NPTS,enable1D= True):
1045	"""
1046	Draw model 1D from loaded data1D
1047	@param data: loaded data
1048	@param model: the model to plot
1049	"""
1050
1051	x= numpy.linspace(start= qmin,
1052	stop= qmax,
1053	num= qstep,
1054	endpoint=True
1055	)
1056	if data!=None:
1057	## check for data2D
1058	if hasattr(data,"x_bins"):
1059	return
1060	x = data.x
1061	if qmin == DEFAULT_QMIN :
1062	qmin = min(data.x)
1063	if qmax == DEFAULT_QMAX:
1064	qmax = max(data.x)
1065
1066	if not enable1D:
1067	return
1068
1069	try:
1070	from model_thread import Calc1D
1071	## If a thread is already started, stop it
1072	if self.calc_1D!= None and self.calc_1D.isrunning():
1073	self.calc_1D.stop()
1074	self.calc_1D= Calc1D( x= x,
1075	data = data,
1076	model= model,
1077	qmin = qmin,
1078	qmax = qmax,
1079	smearer = smearer,
1080	completefn = self._complete1D,
1081	updatefn = self._update1D )
1082	self.calc_1D.queue()
1083
1084	except:
1085	msg= " Error occurred when drawing %s Model 1D: "%model.name
1086	msg+= " %s"%sys.exc_value
1087	wx.PostEvent( self.parent, StatusEvent(status= msg ))
1088	return
1089
1090
1091
1092
1093
1094	if __name__ == "__main__":
1095	i = Plugin()
1096
1097
1098
1099

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SasView

source: sasview/sansview/perspectives/fitting/fitting.py @ fb8daaaf

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