source: sasview/src/sas/models/PowerLawAbsModel.py @ bc202cb

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Last change on this file since bc202cb was 79492222, checked in by krzywon, 10 years ago

Changed the file and folder names to remove all SANS references.

  • Property mode set to 100644
File size: 1007 bytes
Line 
1"""
2    Provide F(x) = scale* (\|x\|)^(-m) + bkd
3    Power law function as a BaseComponent model
4"""
5from sas.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
16    * m     =  power
17    * scale  =  scale factor
18    * bkd    =  incoherent background
19    """
20   
21    def __init__(self):
22        """ Initialization """
23        # Initialize PowerLawAbsModel
24        PowerLawModel.__init__(self)
25        ## Name of the model
26        self.name = "Absolute Power_Law"
27        self.description = """ The Power_Law model.
28        F(x) = scale* (|x|)^(-m) + bkd
29       
30        The model has three parameters:
31        m     =  power
32        scale  =  scale factor
33        bkd    =  incoherent background"""
34       
35       
36    def _PowerLaw(self, x):
37        return PowerLawModel._PowerLaw(self, math.fabs(x))
38       
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