source: sasview/src/sans/models/PowerLawAbsModel.py @ 3d24489

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Last change on this file since 3d24489 was 5777106, checked in by Mathieu Doucet <doucetm@…>, 11 years ago

Moving things around. Will definitely not build.

  • Property mode set to 100644
File size: 1.0 KB
Line 
1"""
2    Provide F(x) = scale* (|x|)^(-m) + bkd
3    Power law function as a BaseComponent model
4"""
5from sans.models.PowerLawModel import PowerLawModel
6import math
7
8class PowerLawAbsModel(PowerLawModel):
9    """
10        Class that evaluates a absolute Power_Law model.
11       
12        F(x) = scale* (|x|)^(-m) + bkd
13       
14        The model has three parameters:
15            m     =  power
16            scale  =  scale factor
17            bkd    =  incoherent background
18    """
19   
20    def __init__(self):
21        """ Initialization """
22        # Initialize PowerLawAbsModel
23        PowerLawModel.__init__(self)
24        ## Name of the model
25        self.name = "Absolute Power_Law"
26        self.description = """ The Power_Law model.
27        F(x) = scale* (|x|)^(-m) + bkd
28       
29        The model has three parameters:
30        m     =  power
31        scale  =  scale factor
32        bkd    =  incoherent background"""
33       
34       
35    def _PowerLaw(self, x):
36        return PowerLawModel._PowerLaw(self, math.fabs(x))
37       
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