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Erf.cc
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1 // -*- C++ -*-
2 // $Id: Erf.cc,v 1.6 2010/06/16 18:22:01 garren Exp $
3 
4 #include <cmath>
5 
8 #include <assert.h>
9 namespace Genfun {
11 
12 Erf::Erf()
13 {
14  _incompleteGamma.a().setValue(0.5);
15 }
16 
17 Erf::Erf(const Erf & right):
18  AbsFunction(right), _incompleteGamma(right._incompleteGamma)
19 {
20 }
21 
23 }
24 
25 double Erf::operator() (double x) const {
26  return x<0 ? -_incompleteGamma(x*x): _incompleteGamma(x*x);
27 }
28 
29 
30 
31 Derivative Erf::partial(unsigned int index) const {
32  assert(index==0);
33  Gaussian gauss = Gaussian();
34  gauss.sigma().setValue(sqrt(2.0));
35  const AbsFunction & fPrime = 2.0*gauss;
36  return Derivative(& fPrime);
37 }
38 
39 } // namespace Genfun
Genfun::Derivative
FunctionNoop Derivative
Definition: CLHEP/GenericFunctions/AbsFunction.hh:40
Genfun::AbsFunction
Definition: CLHEP/GenericFunctions/AbsFunction.hh:48
Genfun::Erf::Erf
Erf()
Definition: Erf.cc:12
Erf.hh
Genfun::Gaussian::sigma
Parameter & sigma()
Definition: Gaussian.cc:44
Genfun::FunctionNoop
Definition: CLHEP/GenericFunctions/FunctionNoop.hh:19
Genfun::Gaussian
Definition: CLHEP/GenericFunctions/Gaussian.hh:20
Gaussian.hh
x
any side effects of that construction would occur twice The semantics of throw x
Definition: whyZMthrowRethrows.txt:37
Genfun::Parameter::setValue
void setValue(double value)
Definition: Parameter.cc:57
FUNCTION_OBJECT_IMP
#define FUNCTION_OBJECT_IMP(classname)
Definition: CLHEP/GenericFunctions/AbsFunction.hh:156
Genfun::Erf::~Erf
virtual ~Erf()
Definition: Erf.cc:22
Genfun::Erf::operator()
virtual double operator()(double argument) const
Definition: Erf.cc:25
Genfun::Erf
Definition: CLHEP/GenericFunctions/Erf.hh:20
Genfun
Definition: CLHEP/GenericFunctions/Abs.hh:14
Genfun::Erf::partial
Derivative partial(unsigned int) const
Definition: Erf.cc:31