1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
|
#/*##########################################################################
#
# The PyMca X-Ray Fluorescence Toolkit
#
# Copyright (c) 2004-2017 European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
#############################################################################*/
__author__ = "V.A. Sole - ESRF Data Analysis"
__contact__ = "sole@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
import sys
import os
import numpy
import logging
from PyMca5.PyMcaIO import ConfigDict
from . import SimpleFitModule
from PyMca5.PyMcaIO import ArraySave
from PyMca5 import PyMcaDirs
_logger = logging.getLogger(__name__)
class StackSimpleFit(object):
def __init__(self, fit=None):
if fit is None:
fit = SimpleFitModule.SimpleFit()
self.fit = fit
self.stack_y = None
self.outputDir = PyMcaDirs.outputDir
self.outputFile = None
self.fixedLenghtOutput = True
self._progress = 0.0
self._status = "Ready"
self.progressCallback = None
self.dataIndex = None
# optimization variables
self.mask = None
self.__ALWAYS_ESTIMATE = True
def setProgressCallback(self, method):
"""
The method will be called as method(current_fit_index, total_fit_index)
"""
self.progressCallback = method
def progressUpdate(self):
"""
This methos returns a dictionnary with the keys
progress: A number between 0 and 100 indicating the fit progress
status: Status of the calculation thread.
"""
ddict = {}
ddict['progress'] = self._progress
ddict['status'] = self._status
return ddict
def setOutputDirectory(self, outputdir):
self.outputDir = outputdir
def setOutputFileBaseName(self, outputfile):
self.outputFile = outputfile
def setData(self, stack_x, stack_y, sigma=None, xmin=None, xmax=None):
self.stack_x = stack_x
self.stack_y = stack_y
self.stack_sigma = sigma
self.xMin = xmin
self.xMax = xmax
def setDataIndex(self, data_index=None):
self.dataIndex = data_index
def setConfigurationFile(self, fname):
if not os.path.exists(fname):
raise IOError("File %s does not exist" % fname)
w = ConfigDict.ConfigDict()
w.read(fname)
self.setConfiguration(w)
def setConfiguration(self, ddict):
self.fit.setConfiguration(ddict, try_import=True)
def processStack(self, mask=None):
self.mask = mask
data_index = self.dataIndex
if data_index == None:
data_index = -1
if type(data_index) == type(1):
data_index = [data_index]
if len(data_index) > 1:
raise IndexError("Only 1D fitting implemented for the time being")
#this leaves the possibility to fit images by giving
#two indices specifying the image dimensions
self.stackDataIndexList = data_index
stack = self.stack_y
if stack is None:
raise ValueError("No data to be processed")
if hasattr(stack, "info") and hasattr(stack, "data"):
data = stack.data
else:
data = stack
#make sure all the indices are positive
for i in range(len(data_index)):
if data_index[i] < 0:
data_index[i] = range(len(data.shape))[data_index[i]]
#get the total number of fits to be performed
outputDimension = []
nPixels = 1
for i in range(len(data.shape)):
if not (i in data_index):
nPixels *= data.shape[i]
outputDimension.append(data.shape[i])
lenOutput = len(outputDimension)
if lenOutput > 2:
raise ValueError("Rank of output greater than 2")
elif lenOutput == 2:
self._nRows = outputDimension[0]
self._nColumns = outputDimension[1]
else:
self._nRows = outputDimension[0]
self._nColumns = 1
if self.mask is not None:
if (self.mask.shape[0] != self._nRows) or\
(self.mask.shape[1] != self._nColumns):
raise ValueError("Invalid mask shape for stack")
else:
self.mask = numpy.ones((self._nRows, self._nColumns),
numpy.uint8)
# optimization
self.__ALWAYS_ESTIMATE = True
backgroundPolicy = self.fit._fitConfiguration['fit'] \
['background_estimation_policy']
functionPolicy = self.fit._fitConfiguration['fit'] \
['function_estimation_policy']
if "Estimate always" not in [functionPolicy, backgroundPolicy]:
self.__ALWAYS_ESTIMATE = False
# initialize control variables
self._parameters = None
self._row = 0
self._column = -1
self._progress = 0
self._status = "Fitting"
for i in range(nPixels):
self._progress = (i * 100.)/ nPixels
if (self._column+1) == self._nColumns:
self._column = 0
self._row += 1
else:
self._column += 1
try:
if self.mask[self._row, self._column]:
self.processStackData(i)
except:
_logger.warning("Error %s processing index = %d, row = %d column = %d",
sys.exc_info()[1], i, self._row, self._column)
if _logger.getEffectiveLevel() == logging.DEBUG:
raise
self.onProcessStackFinished()
self._status = "Ready"
if self.progressCallback is not None:
self.progressCallback(nPixels, nPixels)
def processStackData(self, i):
self.aboutToGetStackData(i)
x, y, sigma, xmin, xmax = self.getFitInputValues(i)
self.fit.setData(x, y, sigma=sigma, xmin=xmin, xmax=xmax)
if self._parameters is None:
_logger.debug("First estimation")
self.fit.estimate()
elif self.__ALWAYS_ESTIMATE:
_logger.debug("Estimation due to settings")
self.fit.estimate()
self.estimateFinished()
values, chisq, sigma, niter, lastdeltachi = self.fit.startFit()
self.fitFinished()
def getFitInputValues(self, index):
"""
Returns the fit parameters x, y, sigma, xmin, xmax
"""
row = self._row
column = self._column
data_index = self.stackDataIndexList[0]
#get y
yShape = self.stack_y.shape
if len(yShape) == 3:
if data_index == 0:
y = self.stack_y[:, row, column]
elif data_index == 1:
y = self.stack_y[row, :, column]
else:
y = self.stack_y[row, column]
elif len(yShape) == 2:
if column > 0:
raise ValueError("Column index > 0 on a single column stack")
y = self.stack_y[row]
else:
raise TypeError("Unsupported y data shape lenght")
#get x
if self.stack_x is None:
nValues = y.size
x = numpy.arange(float(nValues))
x.shape = y.shape
self.stack_x = x
xShape = self.stack_x.shape
xSize = self.stack_x.size
sigma = None
if xShape == yShape:
#as many x as y, follow same criterium
if len(xShape) == 3:
if data_index == 0:
x = self.stack_x[:, row, column]
elif data_index == 1:
x = self.stack_x[row, :, column]
else:
x = self.stack_x[row, column]
elif len(xShape) == 2:
if column > 0:
raise ValueError("Column index > 0 on a single column stack")
x = self.stack_x[row]
else:
raise TypeError("Unsupported x data shape lenght")
elif xSize == y.size:
#only one x for all the y values
x = numpy.zeros(y.size, numpy.float)
x[:] = self.stack_x[:]
x.shape = y.shape
else:
raise ValueError("Cannot handle incompatible X and Y values")
if self.stack_sigma is None:
return x, y, sigma, self.xMin, self.xMax
# get sigma
sigmaShape = self.stack_sigma.shape
sigmaSize = self.stack_sigma.size
if sigmaShape == yShape:
#as many sigma as y, follow same criterium
if len(sigmaShape) == 3:
if data_index == 0:
sigma = self.stack_sigma[:, row, column]
elif data_index == 1:
sigma = self.stack_sigma[row, :, column]
else:
sigma = self.stack_sigma[row, column]
elif len(sigmaShape) == 2:
if column > 0:
raise ValueError("Column index > 0 on a single column stack")
sigma = self.stack_sigma[row]
else:
raise TypeError("Unsupported sigma data shape lenght")
elif sigmaSize == y.size:
#only one sigma for all the y values
sigma = numpy.zeros(y.size, numpy.float)
sgima[:] = self.stack_sigma[:]
sigma.shape = y.shape
else:
raise ValueError("Cannot handle incompatible sigma and y values")
return x, y, sigma, self.xMin, self.xMax
def estimateFinished(self):
_logger.debug("Estimate finished")
def aboutToGetStackData(self, idx):
_logger.debug("New spectrum %d", idx)
self._currentFitIndex = idx
if self.progressCallback is not None:
self.progressCallback(idx, self._nRows * self._nColumns)
if idx == 0:
specfile = os.path.join(self.outputDir,
self.outputFile+".spec")
if os.path.exists(self.outputFile):
os.remove(self.outputFile)
def fitFinished(self):
_logger.debug("fit finished")
#get parameter results
fitOutput = self.fit.getResult(configuration=False)
result = fitOutput['result']
row= self._row
column = self._column
if result is None:
_logger.warning("result not valid for row %d, column %d", row, column)
return
if self.fixedLenghtOutput and (self._parameters is None):
#If it is the first fit, initialize results array
imgdir = os.path.join(self.outputDir, "IMAGES")
if not os.path.exists(imgdir):
os.mkdir(imgdir)
if not os.path.isdir(imgdir):
msg= "%s does not seem to be a valid directory" % imgdir
raise IOError(msg)
self.imgDir = imgdir
self._parameters = []
self._images = {}
self._sigmas = {}
for parameter in result['parameters']:
self._parameters.append(parameter)
self._images[parameter] = numpy.zeros((self._nRows,
self._nColumns),
numpy.float32)
self._sigmas[parameter] = numpy.zeros((self._nRows,
self._nColumns),
numpy.float32)
self._images['chisq'] = numpy.zeros((self._nRows,
self._nColumns),
numpy.float32)
if self.fixedLenghtOutput:
i = 0
for parameter in self._parameters:
self._images[parameter] [row, column] =\
result['fittedvalues'][i]
self._sigmas[parameter] [row, column] =\
result['sigma_values'][i]
i += 1
self._images['chisq'][row, column] = result['chisq']
else:
#specfile output always available
specfile = self.getOutputFileNames()['specfile']
self._appendOneResultToSpecfile(specfile, result=fitOutput)
def _appendOneResultToSpecfile(self, filename, result=None):
if result is None:
result = self.fit.getResult(configuration=False)
scanNumber = self._currentFitIndex
#open file in append mode
fitResult = result['result']
fittedValues = fitResult['fittedvalues']
fittedParameters = fitResult['parameters']
chisq = fitResult['chisq']
text = "\n#S %d %s\n" % (scanNumber, "PyMca Stack Simple Fit")
text += "#N %d\n" % (len(fittedParameters)+2)
text += "#L N Chisq"
for parName in fittedParameters:
text += ' %s' % parName
text += "\n"
text += "1 %f" % chisq
for parValue in fittedValues:
text += "% .7E" % parValue
text += "\n"
sf = open(filename, 'ab')
sf.write(text)
sf.close()
def getOutputFileNames(self):
specfile = os.path.join(self.outputDir,
self.outputFile+".spec")
imgDir = os.path.join(self.outputDir, "IMAGES")
filename = os.path.join(imgDir, self.outputFile)
csv = filename + ".csv"
edf = filename + ".edf"
ddict = {}
ddict['specfile'] = specfile
ddict['csv'] = csv
ddict['edf'] = edf
return ddict
def onProcessStackFinished(self):
_logger.debug("Stack proccessed")
self._status = "Stack Fitting finished"
if self.fixedLenghtOutput:
self._status = "Writing output files"
nParameters = len(self._parameters)
datalist = [None] * (2*len(self._sigmas.keys())+1)
labels = []
for i in range(nParameters):
parameter = self._parameters[i]
datalist[2*i] = self._images[parameter]
datalist[2*i + 1] = self._sigmas[parameter]
labels.append(parameter)
labels.append('s(%s)' % parameter)
datalist[-1] = self._images['chisq']
labels.append('chisq')
filenames = self.getOutputFileNames()
csvName = filenames['csv']
edfName = filenames['edf']
ArraySave.save2DArrayListAsASCII(datalist,
csvName,
labels=labels,
csv=True,
csvseparator=";")
ArraySave.save2DArrayListAsEDF(datalist,
edfName,
labels = labels,
dtype=numpy.float32)
def test():
import numpy
from PyMca5.PyMcaMath.fitting import SpecfitFuns
x = numpy.arange(1000.)
data = numpy.zeros((50, 1000), numpy.float)
#the peaks to be fitted
p0 = [100., 300., 50.,
200., 500., 30.,
300., 800., 65]
#generate the data to be fitted
for i in range(data.shape[0]):
nPeaks = 3 - i % 3
data[i,:] = SpecfitFuns.gauss(p0[:3*nPeaks],x)
oldShape = data.shape
data.shape = 1,oldShape[0], oldShape[1]
instance = StackSimpleFit()
instance.setData(x, data)
# TODO: Generate this file "on-the-fly" to be able to test everywhere
instance.setConfigurationFile(r"C:\StackSimpleFit.cfg")
instance.processStack()
if __name__=="__main__":
test()
|