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GenericFunctions
src
BetaDistribution.cc
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// -*- C++ -*-
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// $Id:
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#include "
CLHEP/GenericFunctions/BetaDistribution.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
(BetaDistribution)
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BetaDistribution
::
BetaDistribution
():
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_alpha("
a
", 1.0, 0.0, 100),
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_beta ("beta", 1.0, 0.0, 100)
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{}
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BetaDistribution::BetaDistribution
(
const
BetaDistribution
& 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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BetaDistribution::~BetaDistribution
() {
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}
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double
BetaDistribution::operator()
(
double
x)
const
{
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double
a
= _alpha.
getValue
(),
b
=_beta.
getValue
();
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return
pow(x,
a
-1)*pow((1-x),
b
-1)*
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exp(_logGamma(
a
+
b
)-_logGamma(
a
)-_logGamma(
b
));
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}
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Parameter
&
BetaDistribution::alpha
() {
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return
_alpha;
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}
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Parameter
&
BetaDistribution::beta
() {
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return
_beta;
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}
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}
// namespace Genfun
FUNCTION_OBJECT_IMP
#define FUNCTION_OBJECT_IMP(classname)
Definition
CLHEP/GenericFunctions/AbsFunction.hh:156
BetaDistribution.hh
Genfun::AbsFunction
Definition
GenericFunctions/AbsFunction.hh:48
Genfun::BetaDistribution
Definition
GenericFunctions/BetaDistribution.hh:21
Genfun::BetaDistribution::operator()
virtual double operator()(double argument) const
Definition
BetaDistribution.cc:28
Genfun::BetaDistribution::beta
Parameter & beta()
Definition
BetaDistribution.cc:40
Genfun::BetaDistribution::BetaDistribution
BetaDistribution()
Definition
BetaDistribution.cc:13
Genfun::BetaDistribution::~BetaDistribution
virtual ~BetaDistribution()
Definition
BetaDistribution.cc:25
Genfun::BetaDistribution::alpha
Parameter & alpha()
Definition
BetaDistribution.cc:35
Genfun::Parameter
Definition
GenericFunctions/Parameter.hh:35
Genfun::Parameter::getValue
virtual double getValue() const
Definition
Parameter.cc:27
Genfun
Definition
CLHEP/GenericFunctions/Abs.hh:14
b
@ b
Definition
testCategories.cc:125
a
@ a
Definition
testCategories.cc:125
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