fitDialog.py @ 7afdc14

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 7afdc14 was 2e07e8f, checked in by Gervaise Alina <gervyh@…>, 16 years ago
litle change on fit
Property mode set to `100644`
File size: 15.6 KB

Line
1	#!/usr/bin/python
2
3	# fitDialog.py
4
5	import wx
6	from PlotPanel import PlotPanel
7	from plottables import Theory1D
8	import math,pylab,fittings
9	import transform
10
11
12	class LinearFit(wx.Dialog):
13	def __init__(self, parent, plottable, push_data,transform, id, title):
14	wx.Dialog.__init__(self, parent, id, title, size=(450, 400))
15	"""
16	Dialog window pops- up when select Linear fit on Context menu
17	Displays fitting parameters
18	"""
19	self.parent = parent
20	self.transform = transform
21	#dialog panel self call function to plot the fitting function
22	self.push_data = push_data
23	#dialog self plottable
24
25	self.plottable = plottable
26	# Receive transformations of x and y
27	self.xLabel,self.yLabel,self.Avalue,self.Bvalue,\
28	self.ErrAvalue,self.ErrBvalue,self.Chivalue= self.transform()
29	#Dialog interface
30	panel = wx.Panel(self, -1, style=wx.SIMPLE_BORDER)
31	vbox = wx.BoxSizer(wx.VERTICAL)
32	sizer = wx.GridBagSizer(5,5)
33
34	vbox.Add(panel, 1, wx.EXPAND \| wx.ALL)
35
36	self.tcA = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
37	self.tcErrA = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
38	self.tcB = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
39	self.tcErrB = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
40	self.tcChi = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
41	self.xminFit = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
42	self.xmaxFit = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
43	self.xminTransFit = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
44	self.xmaxTransFit = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
45	self.initXmin = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
46	self.initXmax = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
47	self.btFit =wx.Button(panel,-1,'Fit',size=(120, 30))
48	self.btClose =wx.Button(panel, wx.ID_CANCEL,'Close',size=(90, 30) )
49	self.static_line_1 = wx.StaticLine(panel, -1)
50
51	ix = 0
52	iy = 1
53	sizer.Add(wx.StaticText(panel, -1, 'y = Ax +B'),(iy, ix),(1,1),\
54	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
55	iy+=1
56	sizer.Add(wx.StaticText(panel, -1, 'Param A'),(iy, ix),\
57	(1,1), wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
58	ix += 1
59	sizer.Add(self.tcA,(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
60	ix += 1
61	sizer.Add(wx.StaticText(panel, -1, '+/-'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
62	ix += 1
63	sizer.Add(self.tcErrA, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
64	iy += 1
65	ix = 0
66	sizer.Add(wx.StaticText(panel, -1, 'Param B'),(iy, ix),(1,1),\
67	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
68	ix += 1
69	sizer.Add(self.tcB, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
70	ix += 1
71	sizer.Add(wx.StaticText(panel, -1, '+/-'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
72	ix += 1
73	sizer.Add(self.tcErrB, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
74	iy += 1
75	ix = 0
76	sizer.Add(wx.StaticText(panel, -1, 'Chi ^{2}'),(iy, ix),(1,1),\
77	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
78	ix += 1
79	sizer.Add(self.tcChi, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
80	iy += 1
81	ix = 1
82	sizer.Add(wx.StaticText(panel, -1, 'Xmin'),(iy, ix),(1,1),\
83	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
84	ix += 2
85	sizer.Add(wx.StaticText(panel, -1, 'Xmax'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
86	iy += 1
87	ix = 0
88	sizer.Add(wx.StaticText(panel, -1, 'Plotted Range'),(iy, ix),(1,1),\
89	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
90	ix +=1
91	sizer.Add(self.initXmin, (iy, ix),(1,1),\
92	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
93	ix += 2
94	sizer.Add(self.initXmax, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
95
96	iy += 1
97	ix = 0
98	sizer.Add(wx.StaticText(panel, -1, 'Fit Range of '+self.xLabel),(iy, ix),(1,1),\
99	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
100	ix += 1
101	sizer.Add(self.xminTransFit, (iy, ix),(1,1),\
102	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
103	ix += 2
104	sizer.Add(self.xmaxTransFit, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
105
106	iy += 1
107	ix = 0
108	sizer.Add(wx.StaticText(panel, -1, 'Fit Range of x'),(iy, ix),(1,1),\
109	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
110	ix += 1
111	sizer.Add(self.xminFit, (iy, ix),(1,1),\
112	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
113	ix += 2
114	sizer.Add(self.xmaxFit, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
115	iy += 1
116	ix = 1
117
118	sizer.Add(self.btFit, (iy, ix),(1,1), wx.LEFT\|wx.ADJUST_MINSIZE, 0)
119	self.btFit.Bind(wx.EVT_BUTTON, self._onFit)
120	ix += 2
121	sizer.Add(self.btClose, (iy, ix),(1,1),\
122	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
123
124	panel.SetSizer(sizer)
125	self.SetSizer(vbox)
126	self.Centre()
127
128	# Receives the type of model for the fitting
129	from LineModel import LineModel
130	self.model = LineModel()
131
132	#Display the fittings values
133	self.default_A = self.model.getParam('A')
134	self.default_B = self.model.getParam('B')
135	self.cstA = fittings.Parameter(self.model, 'A', self.default_A)
136	self.cstB = fittings.Parameter(self.model, 'B', self.default_B)
137
138	# Set default value of parameter in fit dialog
139
140	if self.Avalue==None:
141	self.tcA.SetLabel(str(self.default_A))
142	else :
143	self.tcA.SetLabel(str(self.Avalue))
144	if self.Bvalue==None:
145	self.tcB.SetLabel(str(self.default_B))
146	else:
147	self.tcB.SetLabel(str(self.Bvalue))
148	if self.ErrAvalue==None:
149	self.tcErrA.SetLabel(str(0.0))
150	else:
151	self.tcErrA.SetLabel(str(self.ErrAvalue))
152	if self.ErrBvalue==None:
153	self.tcErrB.SetLabel(str(0.0))
154	else:
155	self.tcErrB.SetLabel(str(self.ErrBvalue))
156	if self.Chivalue==None:
157	self.tcChi.SetLabel(str(0.0))
158	else:
159	self.tcChi.SetLabel(str(self.Chivalue))
160	if self.plottable.x !=[]:
161	self.mini =min(self.plottable.x)
162	self.maxi =max(self.plottable.x)
163	#store the values of View in self.x,self.y,self.dx,self.dy
164	self.x,self.y,self.dx,self.dy= self.plottable.returnValuesOfView()
165
166	self.xminTransFit.SetLabel(str(min(self.x)))
167	self.xmaxTransFit.SetLabel(str(max(self.x)))
168	self.xminTransFit.Disable()
169	self.xmaxTransFit.Disable()
170
171	self.initXmin.SetValue(str(self.mini))
172	self.initXmax.SetValue(str(self.maxi))
173	self.initXmin.Disable()
174	self.initXmax.Disable()
175
176	self.xminFit.SetLabel(str(self.mini))
177	self.xmaxFit.SetLabel(str(self.maxi))
178
179
180	def _onFit(self ,event):
181	"""
182	Performs the fit. Receive an event when clicking on the button Fit.Computes chisqr ,
183	A and B parameters of the best linear fit y=Ax +B
184	Push a plottable to
185	"""
186	tempx=[]
187	tempy=[]
188	tempdy = []
189
190
191
192
193	# Check if View contains a x array .we online fit when x exits
194	# makes transformation for y as a line to fit
195	if self.x != []:
196
197
198	if(self.checkFitValues(self.xminFit) == True):
199	#Check if the field of Fit Dialog contain values and use the x max and min of the user
200	xmin,xmax = self._checkVal(self.xminFit.GetValue(),self.xmaxFit.GetValue())
201
202	xminView=self.floatTransform(xmin)
203	xmaxView=self.floatTransform(xmax)
204	if (self.xLabel=="log10(x)"):
205	self.xminTransFit.SetValue(str(math.log10(xminView)))
206	self.xmaxTransFit.SetValue(str(math.log10(xmaxView)))
207	else:
208	self.xminTransFit.SetValue(str(xminView))
209	self.xmaxTransFit.SetValue(str(xmaxView))
210	self.xminTransFit.Disable()
211	self.xmaxTransFit.Disable()
212	# Store the transformed values of view x, y,dy in variables before the fit
213	if self.yLabel.lower() == "log10(y)":
214	if (self.xLabel.lower() == "log10(x)"):
215	for i in range(len(self.x)):
216	if self.x[i]>= math.log10(xmin):
217	tempy.append(math.log10(self.y[i]))
218	tempdy.append(transform.errToLogX(self.y[i],0,self.dy[i],0))
219	else:
220	for i in range(len(self.y)):
221	tempy.append(math.log10(self.y[i]))
222	tempdy.append(transform.errToLogX(self.y[i],0,self.dy[i],0))
223	else:
224	tempy = self.y
225	tempdy = self.dy
226
227	if (self.xLabel.lower() == "log10(x)"):
228	for x_i in self.x:
229	if x_i >= math.log10(xmin):
230	tempx.append(math.log10(x_i))
231	else:
232	tempx = self.x
233
234	#Find the fitting parameters
235
236	if (self.xLabel.lower() == "log10(x)"):
237	chisqr, out, cov = fittings.sansfit(self.model, [self.cstA, self.cstB],
238	tempx, tempy,tempdy,math.log10(xmin),math.log10(xmax))
239	else:
240	chisqr, out, cov = fittings.sansfit(self.model,
241	[self.cstA, self.cstB],tempx, tempy,tempdy,xminView,xmaxView)
242	#print "this out",out
243	#Check that cov and out are iterable before displaying them
244	if cov ==None:
245	errA =0.0
246	errB =0.0
247	else:
248	errA= math.sqrt(cov[0][0])
249	errB= math.sqrt(cov[1][1])
250	if out==None:
251	cstA=0.0
252	cstB=0.0
253	else:
254	cstA=out[0]
255	cstB=out[1]
256	# Reset model with the right values of A and B
257	self.model.setParam('A', float(cstA))
258	self.model.setParam('B', float(cstB))
259
260	tempx = []
261	tempy = []
262	y_model = 0.0
263	# load tempy with the minimum transformation
264
265	if self.xLabel == "log10(x)":
266	y_model = self.model.run(math.log10(xmin))
267	tempx.append(xmin)
268	else:
269	y_model = self.model.run(xminView)
270	tempx.append(xminView)
271
272	if self.yLabel == "log10(y)":
273	tempy.append(math.pow(10,y_model))
274	print "tempy",tempy
275	else:
276	tempy.append(y_model)
277
278	# load tempy with the maximum transformation
279	if self.xLabel == "log10(x)":
280	y_model = self.model.run(math.log10(xmax))
281	tempx.append(xmax)
282	else:
283	y_model = self.model.run(xmaxView)
284	tempx.append(xmaxView)
285
286	if self.yLabel == "log10(y)":
287	tempy.append(math.pow(10,y_model))
288	else:
289	tempy.append(y_model)
290	#Set the fit parameter display when FitDialog is opened again
291	self.Avalue=cstB
292	self.Bvalue=cstA
293	self.ErrAvalue=errA
294	self.ErrBvalue=errB
295	self.Chivalue=chisqr
296	self.push_data(tempx,tempy,xminView,xmaxView,xmin,xmax,self._ongetValues())
297
298	# Display the fitting value on the Fit Dialog
299	self._onsetValues(cstB, cstA, errA,errB,chisqr)
300
301
302
303	def _onsetValues(self,cstA,cstB,errA,errB,Chi):
304	"""
305	Display the value on fit Dialog
306	"""
307	self.tcA.SetValue(str(cstA))
308	self.tcB.SetValue(str(cstB))
309	self.tcErrA.SetValue(str(errA))
310	self.tcErrB.SetValue(str(errB))
311	self.tcChi.SetValue(str(Chi))
312
313	def _ongetValues(self):
314	"""
315	Display the value on fit Dialog
316	"""
317	return self.Avalue, self.Bvalue,self.ErrAvalue,self.ErrBvalue,self.Chivalue
318
319
320	def _checkVal(self,usermin, usermax):
321	"""
322	Ensure that fields parameter contains a min and a max value
323	within x min and x max range
324	"""
325	if float(usermin) < float(usermax):
326	if float(usermin) >= float(self.mini) and float(usermin) < float(self.maxi):
327	self.xminFit.SetValue(str(usermin))
328	else:
329	self.xminFit.SetValue(str(self.mini))
330
331	if float(usermax) > float(self.mini) and float(usermax) <= float(self.maxi):
332	self.xmaxFit.SetLabel(str(usermax))
333	else:
334	self.xmaxFit.SetLabel(str(self.maxi))
335
336	mini =float(self.xminFit.GetValue())
337	maxi =float(self.xmaxFit.GetValue())
338
339	return mini, maxi
340	def floatTransform(self,x):
341	"""
342	transform a float.It is use to determine the x.View min and x.View max for values
343	not in x
344	"""
345	if ( self.xLabel=="x" ):
346	return transform.toX(x)
347
348	if ( self.xLabel=="x^(2)" ):
349	return transform.toX2(x)
350
351	if (self.xLabel=="log10(x)" ):
352	if x >0:
353	return x
354	else:
355	raise ValueError,"cannot compute log of a negative number"
356
357	def checkFitValues(self,item):
358	"""
359	Check the validity of input values
360	"""
361	flag = True
362	value = item.GetValue()
363	# Check for possible values entered
364	if (self.xLabel=="log10(x)"):
365	if (float(value) > 0):
366	item.SetBackgroundColour(wx.WHITE)
367	item.Refresh()
368	else:
369	flag = False
370	item.SetBackgroundColour("pink")
371	item.Refresh()
372
373	return flag
374
375	def setFitRange(self,xmin,xmax,xminTrans,xmaxTrans):
376	"""
377	Set fit parameters
378	"""
379	self.xminFit.SetValue(str(xmin))
380	self.xmaxFit.SetValue(str(xmax))
381	self.xminTransFit.SetValue(str(xminTrans))
382	self.xmaxTransFit.SetValue(str(xmaxTrans))
383
384
385	if __name__ == "__main__":
386	app = wx.App()
387	dialog=LinearFit(None, -1, 'Fitting')
388	dialog.ShowModal()
389	app.MainLoop()
390
391

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source: sasview/guitools/fitDialog.py @ 7afdc14

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