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 7bcbeb7 was
79492222,
checked in by krzywon, 10 years ago
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Changed the file and folder names to remove all SANS references.
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-
Property mode set to
100644
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File size:
1007 bytes
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Rev | Line | |
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[51f14603] | 1 | """ |
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| 2 | Provide F(x) = scale* (\|x\|)^(-m) + bkd |
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| 3 | Power law function as a BaseComponent model |
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| 4 | """ |
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[79492222] | 5 | from sas.models.PowerLawModel import PowerLawModel |
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[51f14603] | 6 | import math |
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| 7 | |
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| 8 | class PowerLawAbsModel(PowerLawModel): |
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| 9 | """ |
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| 10 | Class that evaluates a absolute Power_Law model. :: |
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| 11 | |
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| 12 | F(x) = scale* (|x|)^(-m) + bkd |
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| 13 | |
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| 14 | The model has three parameters: |
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| 15 | |
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| 16 | * m = power |
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| 17 | * scale = scale factor |
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| 18 | * bkd = incoherent background |
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| 19 | """ |
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| 20 | |
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| 21 | def __init__(self): |
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| 22 | """ Initialization """ |
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| 23 | # Initialize PowerLawAbsModel |
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| 24 | PowerLawModel.__init__(self) |
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| 25 | ## Name of the model |
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| 26 | self.name = "Absolute Power_Law" |
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| 27 | self.description = """ The Power_Law model. |
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| 28 | F(x) = scale* (|x|)^(-m) + bkd |
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| 29 | |
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| 30 | The model has three parameters: |
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| 31 | m = power |
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| 32 | scale = scale factor |
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| 33 | bkd = incoherent background""" |
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| 34 | |
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| 35 | |
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| 36 | def _PowerLaw(self, x): |
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| 37 | return PowerLawModel._PowerLaw(self, math.fabs(x)) |
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[9ce41c6] | 38 | |
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