fitDialog.py @ eca05c8

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 eca05c8 was f193585, checked in by Gervaise Alina <gervyh@…>, 17 years ago
some changes
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File size: 13.4 KB

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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, id, title):
14	def __init__(self, parent, plottable, push_data,transform, id, title):
15	wx.Dialog.__init__(self, parent, id, title, size=(450, 300))
16	"""
17	for the fit window
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	self.plottable = plottable
25
26	#Dialog interface
27	panel = wx.Panel(self, -1, style=wx.SIMPLE_BORDER)
28	vbox = wx.BoxSizer(wx.VERTICAL)
29	sizer = wx.GridBagSizer(5,5)
30
31	vbox.Add(panel, 1, wx.EXPAND \| wx.ALL)
32
33	self.tcA = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
34	self.tcErrA = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
35	self.tcB = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
36	self.tcErrB = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
37	self.tcChi = wx.TextCtrl(panel, -1,size=(120,20),style=wx.SIMPLE_BORDER)
38	self.FXmin = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
39	self.FXmax = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
40	self.PXmin = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
41	self.PXmax = wx.TextCtrl(panel,-1,size=(120,20),style=wx.SIMPLE_BORDER)
42	self.btFit =wx.Button(panel,-1,'Fit',size=(120, 30))
43	self.btClose =wx.Button(panel, wx.ID_CANCEL,'Close',size=(90, 30) )
44	self.static_line_1 = wx.StaticLine(panel, -1)
45
46	ix = 0
47	iy = 1
48	sizer.Add(wx.StaticText(panel, -1, 'y = Ax +B'),(iy, ix),(1,1),\
49	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
50	iy+=1
51	sizer.Add(wx.StaticText(panel, -1, 'Param A'),(iy, ix),\
52	(1,1), wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
53	ix += 1
54	sizer.Add(self.tcA,(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
55	ix += 1
56	sizer.Add(wx.StaticText(panel, -1, '+/-'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
57	ix += 1
58	sizer.Add(self.tcErrA, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
59	iy += 1
60	ix = 0
61	sizer.Add(wx.StaticText(panel, -1, 'Param B'),(iy, ix),(1,1),\
62	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
63	ix += 1
64	sizer.Add(self.tcB, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
65	ix += 1
66	sizer.Add(wx.StaticText(panel, -1, '+/-'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
67	ix += 1
68	sizer.Add(self.tcErrB, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
69	iy += 1
70	ix = 0
71	sizer.Add(wx.StaticText(panel, -1, 'Chi ^{2}'),(iy, ix),(1,1),\
72	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
73	ix += 1
74	sizer.Add(self.tcChi, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
75	iy += 1
76	ix = 1
77	sizer.Add(wx.StaticText(panel, -1, 'Xmin'),(iy, ix),(1,1),\
78	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
79	ix += 2
80	sizer.Add(wx.StaticText(panel, -1, 'Xmax'),(iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
81	iy += 1
82	ix = 0
83	sizer.Add(wx.StaticText(panel, -1, 'Plotted Range'),(iy, ix),(1,1),\
84	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
85	ix +=1
86	sizer.Add(self.PXmin, (iy, ix),(1,1),\
87	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
88	ix += 2
89	sizer.Add(self.PXmax, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
90	iy += 1
91	ix = 0
92	sizer.Add(wx.StaticText(panel, -1, 'Fit Range'),(iy, ix),(1,1),\
93	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 15)
94	ix += 1
95	sizer.Add(self.FXmin, (iy, ix),(1,1),\
96	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
97	ix += 2
98	sizer.Add(self.FXmax, (iy, ix),(1,1), wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
99	iy += 1
100	ix = 1
101
102	sizer.Add(self.btFit, (iy, ix),(1,1), wx.LEFT\|wx.ADJUST_MINSIZE, 0)
103	self.btFit.Bind(wx.EVT_BUTTON, self._onFit)
104	ix += 2
105	sizer.Add(self.btClose, (iy, ix),(1,1),\
106	wx.LEFT\|wx.EXPAND\|wx.ADJUST_MINSIZE, 0)
107
108	panel.SetSizer(sizer)
109	self.SetSizer(vbox)
110	self.Centre()
111
112	# Receives the type of model for the fitting
113	from LineModel import LineModel
114	self.model = LineModel()
115
116	#Display the fittings values
117	self.default_A = self.model.getParam('A')
118	self.default_B = self.model.getParam('B')
119	self.cstA = fittings.Parameter(self.model, 'A', self.default_A)
120	self.cstB = fittings.Parameter(self.model, 'B', self.default_B)
121
122	# Set default value of parameter in fit dialog
123	self.tcA.SetLabel(str(self.default_A))
124	self.tcB.SetLabel(str(self.default_B))
125	self.tcErrA.SetLabel(str(0.0))
126	self.tcErrB.SetLabel(str(0.0))
127	self.tcChi.SetLabel(str(0.0))
128	if self.plottable.x !=[]:
129	self.mini =min(self.plottable.x)
130	self.maxi =max(self.plottable.x)
131	self.FXmin.SetLabel(str(self.mini))
132	self.FXmax.SetLabel(str(self.maxi))
133
134	self.PXmin.SetValue(str(self.mini))
135	self.PXmax.SetValue(str(self.maxi))
136	self.PXmin.Disable()
137	self.PXmax.Disable()
138
139	# new data for the fit
140	self.file_data1 = Theory1D(x=[], y=[], dy=None)
141	self.file_data1.name = "Fit"
142	# Receive transformations of x and y
143	self.xtrans,self.ytrans= self.transform()
144	def _onFit(self ,event):
145	"""
146	Performs the fit. Receive an event when clicking on the button Fit.Computes chisqr ,
147	A and B parameters of the best linear fit y=Ax +B
148	Push a plottable to
149	"""
150
151	tempx=[]
152	tempy=[]
153	tempdy = []
154
155	#store the values of View in x,y, dx,dy
156	x,y,dx,dy=self.plottable.returnValuesOfView()
157	# Receive transformations of x and y
158	self.xtrans,self.ytrans= self.transform()
159
160	# Check if View contains a x array .we online fit when x exits
161	# makes transformation for y as a line to fit
162	if x != []:
163	if(self.checkFitValues(self.FXmin) == True):
164	#Check if the field of Fit Dialog contain values and use the x max and min of the user
165	xmin,xmax = self._checkVal(self.FXmin.GetValue(),self.FXmax.GetValue())
166	xminView=self.floatTransform(xmin)
167	xmaxView=self.floatTransform(xmax)
168
169	# Store the transformed values of view x, y,dy in variables before the fit
170	if self.ytrans.lower() == "log10(y)":
171	if (self.xtrans.lower() == "log10(x)"):
172	for i in range(len(x)):
173	if x[i]>=xmin:
174	tempy.append(math.log10(y[i]))
175	tempdy.append(transform.errToLogX(y[i],0,dy[i],0))
176	else:
177	for y_i in y:
178	tempy.append(math.log10(y_i))
179	tempdy.append(transform.errToLogX(y[i],0,dy[i],0))
180	else:
181	tempy = y
182	tempdy = dy
183
184	if (self.xtrans.lower() == "log10(x)"):
185	for x_i in x:
186	if x_i >= xmin:
187	tempx.append(math.log10(x_i))
188	else:
189	tempx = x
190
191	#for y_i in y:
192	# dy = math.sqrt(math.fabs(y_i))
193	# if dy >= y_i:
194	# dy = 0.9*y_i
195	# tempdy.append(dy)
196
197	#Find the fitting parameters
198
199	chisqr, out, cov = fittings.sansfit(self.model,
200	[self.cstA, self.cstB],tempx, tempy,tempdy,xminView,xmaxView)
201	print "this out",out
202	#Check that cov and out are iterable before displaying them
203	if cov ==None:
204	errA =0.0
205	errB =0.0
206	else:
207	errA= math.sqrt(cov[0][0])
208	errB= math.sqrt(cov[1][1])
209	if out==None:
210	cstA=0.0
211	cstB=0.0
212	else:
213	cstA=out[0]
214	cstB=out[1]
215	# Reset model with the right values of A and B
216	self.model.setParam('A', float(cstA))
217	self.model.setParam('B', float(cstB))
218
219	tempx = []
220	tempy = []
221	y_model = 0.0
222	# load tempy with the minimum transformation
223
224	if self.xtrans == "log10(x)":
225	y_model = self.model.run(math.log10(xmin))
226	tempx.append(xmin)
227	else:
228	y_model = self.model.run(xminView)
229	tempx.append(xminView)
230
231	if self.ytrans == "log10(y)":
232	tempy.append(math.pow(10,y_model))
233	print "tempy",tempy
234	else:
235	tempy.append(y_model)
236
237	# load tempy with the maximum transformation
238	if self.xtrans == "log10(x)":
239	y_model = self.model.run(math.log10(xmax))
240	tempx.append(xmax)
241	else:
242	y_model = self.model.run(xmaxView)
243	tempx.append(xmaxView)
244
245	if self.ytrans == "log10(y)":
246	tempy.append(math.pow(10,y_model))
247	else:
248	tempy.append(y_model)
249
250	# Create new data plottable with result
251	self.file_data1.x =[]
252	self.file_data1.y =[]
253	self.file_data1.x =tempx
254	self.file_data1.y =tempy
255	self.file_data1.dx=None
256	self.file_data1.dy=None
257	#Load the view with the new values
258	self.file_data1.reset_view()
259
260	#Send the data to display to the PlotPanel
261	self.push_data(self.file_data1)
262
263	# Display the fitting value on the Fit Dialog
264	self._onsetValues(cstA, cstB, errA,errB,chisqr)
265
266	def _onsetValues(self,cstA,cstB,errA,errB,Chi):
267	"""
268	Display the value on fit Dialog
269	"""
270	self.tcA.SetValue(str(cstA))
271	self.tcB.SetValue(str(cstB))
272	self.tcErrA.SetValue(str(errA))
273	self.tcErrB.SetValue(str(errB))
274	self.tcChi.SetValue(str(Chi))
275
276	def _returnPlottable(self):
277	return self.file_data1
278
279	def _checkVal(self,usermin, usermax):
280	"""
281	Ensure that fields parameter contains a min and a max value
282	within x min and x max range
283	"""
284	if float(usermin) < float(usermax):
285	if float(usermin) >= float(self.mini) and float(usermin) < float(self.maxi):
286	self.FXmin.SetValue(str(usermin))
287	else:
288	self.FXmin.SetValue(str(self.mini))
289
290	if float(usermax) > float(self.mini) and float(usermax) <= float(self.maxi):
291	self.FXmax.SetLabel(str(usermax))
292	else:
293	self.FXmax.SetLabel(str(self.maxi))
294
295	mini =float(self.FXmin.GetValue())
296	maxi =float(self.FXmax.GetValue())
297
298	return mini, maxi
299	def floatTransform(self,x):
300	"""
301	transform a float.It is use to determine the x.View min and x.View max for values
302	not in x
303	"""
304	if ( self.xtrans=="x" ):
305	return transform.toX(x)
306
307	if ( self.xtrans=="x^(2)" ):
308	return transform.toX2(x)
309
310	if (self.xtrans=="log10(x)" ):
311	if x >0:
312	return math.log10(x)
313	else:
314	raise ValueError,"cannot compute log of a negative number"
315
316	def checkFitValues(self,item):
317	"""
318	Check the validity of input values
319	"""
320	flag = True
321	value = item.GetValue()
322	# Check for possible values entered
323	if (self.xtrans=="log10(x)"):
324	if (float(value) > 0):
325	item.SetBackgroundColour(wx.WHITE)
326	item.Refresh()
327	else:
328	flag = False
329	item.SetBackgroundColour("pink")
330	item.Refresh()
331
332	return flag
333
334
335
336	if __name__ == "__main__":
337	app = wx.App()
338	dialog=LinearFit(None, -1, 'Fitting')
339	dialog.ShowModal()
340	app.MainLoop()
341
342

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SasView

source: sasview/guitools/fitDialog.py @ eca05c8

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