fitDialog.py @ 863607a

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 863607a was 46693050, checked in by Gervaise Alina <gervyh@…>, 16 years ago
working on fit linear
Property mode set to `100644`
File size: 11.8 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
143	def _onFit(self ,event):
144	"""
145	Performs the fit. Receive an event when clicking on the button Fit.Computes chisqr ,
146	A and B parameters of the best linear fit y=Ax +B
147	Push a plottable to
148	"""
149
150	tempx=[]
151	tempy=[]
152	tempdy = []
153
154	#Check if the field of Fit Dialog contain values and use the x max and min of the user
155	xmin,xmax = self._checkVal(self.FXmin.GetValue(),self.FXmax.GetValue())
156	#store the values of View in x,y, dx,dy
157	x,y,dx,dy=self.plottable.returnValuesOfView()
158	# Receive transformations of x and y
159	self.xtrans,self.ytrans= self.transform()
160
161	# Check if View contains a x array .we online fit when x exits
162	# makes transformation for y as a line to fit
163	if x != []:
164	xminView=self.floatTransform(xmin)
165	xmaxView=self.floatTransform(xmax)
166
167	# Store the transformed values of view x, y,dy in variables before the fit
168	if self.ytrans.lower() == "log10(y)":
169	for y_i in y:
170	tempy.append(math.log10(y_i))
171	else:
172	tempy = y
173	if self.xtrans.lower() == "log10(x)":
174	for x_i in x:
175	tempx.append(math.log10(x_i))
176	else:
177	tempx = x
178
179	for y_i in y:
180	dy = 1/y_i
181	if dy >= y_i:
182	dy = 0.9*y_i
183	tempdy.append(dy)
184
185	#Find the fitting parameters
186	chisqr, out, cov = fittings.sansfit(self.model,
187	[self.cstA, self.cstB],tempx, tempy,tempdy,xminView,xmaxView)
188
189	#Check that cov and out are iterable before displaying them
190	if cov ==None:
191	errA =0.0
192	errB =0.0
193	else:
194	errA= math.sqrt(cov[0][0])
195	errB= math.sqrt(cov[1][1])
196	if out==None:
197	cstA=0.0
198	cstB=0.0
199	else:
200	cstA=out[0]
201	cstB=out[1]
202	# Reset model with the right values of A and B
203	self.model.setParam('A', float(cstA))
204	self.model.setParam('B', float(cstB))
205
206	tempx = []
207	tempy = []
208	y_model = 0.0
209	# load tempy with the minimum transformation
210
211	if self.xtrans == "log10(x)":
212	y_model = self.model.run(math.log10(xmin))
213	tempx.append(xmin)
214	else:
215	y_model = self.model.run(xminView)
216	tempx.append(xminView)
217
218	if self.ytrans == "log10(y)":
219	tempy.append(math.pow(10,y_model))
220	else:
221	tempy.append(y_model)
222
223	# load tempy with the maximum transformation
224	if self.xtrans == "log10(x)":
225	y_model = self.model.run(math.log10(xmax))
226	tempx.append(xmax)
227	else:
228	y_model = self.model.run(xmaxView)
229	tempx.append(xmaxView)
230
231	if self.ytrans == "log10(y)":
232	tempy.append(math.pow(10,y_model))
233	else:
234	tempy.append(y_model)
235
236	# Create new data plottable with result
237	self.file_data1.x =[]
238	self.file_data1.y =[]
239	self.file_data1.x =tempx
240	self.file_data1.y =tempy
241	self.file_data1.dx=None
242	self.file_data1.dy=None
243	#Load the view with the new values
244	self.file_data1.reset_view()
245
246	#Send the data to display to the PlotPanel
247	self.push_data(self.file_data1,xminView, xmaxView)
248
249	# Display the fitting value on the Fit Dialog
250	self._onsetValues(cstA, cstB, errA,errB,chisqr)
251
252	def _onsetValues(self,cstA,cstB,errA,errB,Chi):
253	"""
254	Display the value on fit Dialog
255	"""
256	self.tcA.SetValue(str(cstA))
257	self.tcB.SetValue(str(cstB))
258	self.tcErrA.SetValue(str(errA))
259	self.tcErrB.SetValue(str(errB))
260	self.tcChi.SetValue(str(Chi))
261
262	def _returnPlottable(self):
263	return self.file_data1
264
265	def _checkVal(self,usermin, usermax):
266	"""
267	Ensure that fields parameter contains a min and a max value
268	within x min and x max range
269	"""
270	if float(usermin) < float(usermax):
271	if float(usermin) >= float(self.mini) and float(usermin) < float(self.maxi):
272	self.FXmin.SetValue(str(usermin))
273	else:
274	self.FXmin.SetValue(str(self.mini))
275
276	if float(usermax) > float(self.mini) and float(usermax) <= float(self.maxi):
277	self.FXmax.SetLabel(str(usermax))
278	else:
279	self.FXmax.SetLabel(str(self.maxi))
280
281	mini =float(self.FXmin.GetValue())
282	maxi =float(self.FXmax.GetValue())
283
284	return mini, maxi
285	def floatTransform(self,x):
286	"""
287	transform a float.It is use to determine the x.View min and x.View max for values
288	not in x
289	"""
290	if ( self.xtrans=="x" ):
291	return transform.toX(x)
292
293	if ( self.xtrans=="x^(2)" ):
294	return transform.toX2(x)
295
296	if (self.xtrans=="log10(x)" ):
297	if x >0:
298	return math.log10(x)
299	else:
300	raise ValueError,"cannot compute log of a negative number"
301
302
303
304	if __name__ == "__main__":
305	app = wx.App()
306	dialog=LinearFit(None, -1, 'Fitting')
307	dialog.ShowModal()
308	app.MainLoop()
309
310

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SasView

source: sasview/guitools/fitDialog.py @ 863607a

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