示例#1
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 def __init__(self):
     """ Initialization """
     # Initialize PowerLawAbsModel
     PowerLawModel.__init__(self)
     ## Name of the model
     self.name = "Absolute Power_Law"
     self.description = """ The Power_Law model.
示例#2
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 def __init__(self):
     """ Initialization """
     # Initialize PowerLawAbsModel 
     PowerLawModel.__init__(self)
     ## Name of the model
     self.name = "Absolute Power_Law"
     self.description = """ The Power_Law model.
示例#3
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 def setUp(self):
     from sas.models.PowerLawModel import PowerLawModel
     self.model= PowerLawModel()
示例#4
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class TestPowerLaw(unittest.TestCase):
    """
        Unit tests for PowerLaw function

        F(x) = scale* (x)^(m) + bkd
        
        The model has three parameters: 
            m     =  power
            scale  =  scale factor
            bkd    =  incoherent background
    """
    def _func(self, a, m, bgd, qval):
        return a*math.pow(qval,-m) + bgd
    
    
    def setUp(self):
        from sas.models.PowerLawModel import PowerLawModel
        self.model= PowerLawModel()
        
    def test1D(self):
        self.model.setParam('scale', math.exp(-6))
        self.model.setParam('m', 4.0)
        self.model.setParam('background', 1.0)
        
        #self.assertEqual(self.model.run(0.0), 1.0)
        self.assertEqual(self.model.run(2.0), self._func(math.exp(-6), 4.0, 1.0, 2.0))
        self.assertEqual(self.model.runXY(2.0), self._func(math.exp(-6), 4.0, 1.0, 2.0))
    
    def testlimit(self):
        self.model.setParam('scale', math.exp(-6))
        self.model.setParam('m', -4.0)
        self.model.setParam('background', 1.0)
        
        self.assertEqual(self.model.run(0.0), 1.0)
        
    def test2D(self):
        self.model.setParam('scale', math.exp(-6))
        self.model.setParam('m', 4.0)
        self.model.setParam('background', 1.0)
        
        #value = self._func(math.exp(-6), 4.0, 1.0, 1.0)\
        #*self._func(math.exp(-6), 4.0, 1.0, 2.0)    
        value = self._func(math.exp(-6), 4.0, 1.0, math.sqrt(5.0))
        
        self.assertEqual(self.model.runXY([1.0,2.0]), value)
        
    def test2Dphi(self):
        self.model.setParam('scale', math.exp(-6))
        self.model.setParam('m', 4.0)
        self.model.setParam('background', 1.0)
        
        x = 1.0
        y = 2.0
        r = math.sqrt(x**2 + y**2)
        phi = math.atan2(y, x)
        
        value = self._func(math.exp(-6), 4.0, 1.0, x)\
        *self._func(math.exp(-6), 4.0, 1.0, y)
        self.assertAlmostEquals(self.model.run([r, phi]), value,1)
示例#5
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 def _PowerLaw(self, x):
     return PowerLawModel._PowerLaw(self, math.fabs(x))
示例#6
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 def _PowerLaw(self, x):
     return PowerLawModel._PowerLaw(self, math.fabs(x))