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-4.2.2ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload
Last change
on this file since 41345d7e was
a2db1ab,
checked in by lewis, 8 years ago
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Compute transform on a separate thread
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-
Property mode set to
100644
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File size:
1.3 KB
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Rev | Line | |
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[a2db1ab] | 1 | from sas.sascalc.data_util.calcthread import CalcThread |
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| 2 | from sas.sascalc.dataloader.data_info import Data1D |
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| 3 | from scipy.fftpack import dct |
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| 4 | import numpy as np |
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| 5 | from time import sleep |
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| 6 | |
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| 7 | class TransformThread(CalcThread): |
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| 8 | def __init__(self, raw_data, extrapolated_data, bg, updatefn=None, |
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| 9 | completefn=None): |
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| 10 | CalcThread.__init__(self, updatefn=updatefn, completefn=completefn) |
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| 11 | self.data = raw_data |
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| 12 | self.background = bg |
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| 13 | self.extrapolation = extrapolated_data |
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| 14 | |
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| 15 | def compute(self): |
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| 16 | qs = self.extrapolation.x |
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| 17 | iqs = self.extrapolation.y |
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| 18 | q = self.data.x |
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| 19 | background = self.background |
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| 20 | |
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| 21 | self.ready(delay=0.0) |
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| 22 | self.update(msg="Starting Fourier transform.") |
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| 23 | self.ready(delay=0.0) |
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| 24 | if self.isquit(): |
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| 25 | return |
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| 26 | try: |
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| 27 | gamma = dct((iqs-background)*qs**2) |
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| 28 | gamma = gamma / gamma.max() |
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| 29 | except: |
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| 30 | self.update(msg="Fourier transform failed.") |
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| 31 | self.complete(transform=None) |
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| 32 | return |
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| 33 | if self.isquit(): |
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| 34 | return |
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| 35 | self.update(msg="Fourier transform completed.") |
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| 36 | |
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| 37 | xs = np.pi*np.arange(len(qs),dtype=np.float32)/(q[1]-q[0])/len(qs) |
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| 38 | transform = Data1D(xs, gamma) |
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| 39 | |
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| 40 | self.complete(transform=transform) |
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