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GenericFunctions
src
GammaDistribution.cc
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// -*- C++ -*-
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// $Id:
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#include "
CLHEP/GenericFunctions/GammaDistribution.hh
"
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#include <assert.h>
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#include <cmath>
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using namespace
std;
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namespace
Genfun {
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FUNCTION_OBJECT_IMP
(GammaDistribution)
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GammaDistribution
::
GammaDistribution
():
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_alpha("
a
", 2.0, 1.0, 100),
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_beta ("beta", 0.0, 0, 100)
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{}
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GammaDistribution::GammaDistribution(
const
GammaDistribution
& right):
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AbsFunction
(right),
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_alpha(right._alpha),
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_beta (right._beta)
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{
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}
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GammaDistribution::~GammaDistribution
() {
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}
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double
GammaDistribution::operator()
(
double
x)
const
{
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return
std::pow(x,_alpha.
getValue
()-1)*
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exp(-x/_beta.
getValue
())/std::pow(_beta.
getValue
(),(_alpha.
getValue
()))/
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exp(_logGamma(_alpha.
getValue
()));
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}
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Parameter
&
GammaDistribution::alpha
() {
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return
_alpha;
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}
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Parameter
&
GammaDistribution::beta
() {
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return
_beta;
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}
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}
// namespace Genfun
Genfun::AbsFunction
Definition:
CLHEP/GenericFunctions/AbsFunction.hh:48
Genfun::GammaDistribution::beta
Parameter & beta()
Definition:
GammaDistribution.cc:40
Genfun::GammaDistribution::alpha
Parameter & alpha()
Definition:
GammaDistribution.cc:35
GammaDistribution.hh
Genfun::GammaDistribution::~GammaDistribution
virtual ~GammaDistribution()
Definition:
GammaDistribution.cc:25
a
Definition:
testCategories.cc:125
Genfun::GammaDistribution
Definition:
CLHEP/GenericFunctions/GammaDistribution.hh:21
Genfun::GammaDistribution::operator()
virtual double operator()(double argument) const
Definition:
GammaDistribution.cc:28
FUNCTION_OBJECT_IMP
#define FUNCTION_OBJECT_IMP(classname)
Definition:
CLHEP/GenericFunctions/AbsFunction.hh:156
Genfun::Parameter
Definition:
CLHEP/GenericFunctions/Parameter.hh:35
Genfun::Parameter::getValue
virtual double getValue() const
Definition:
Parameter.cc:27
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