EvtItgAbsIntegrator Class Reference

#include <EvtItgAbsIntegrator.hh>

Inheritance diagram for EvtItgAbsIntegrator:

Public Member Functions
	EvtItgAbsIntegrator (const EvtItgAbsFunction &)
virtual	~EvtItgAbsIntegrator ()
double	evaluate (double lower, double upper) const
double	normalisation () const
	EvtItgAbsIntegrator (const EvtItgAbsFunction &)
virtual	~EvtItgAbsIntegrator ()
double	evaluate (double lower, double upper) const
double	normalisation () const

Protected Member Functions
double	trapezoid (double lower, double higher, int n, double &result) const
virtual double	evaluateIt (double lower, double higher) const =0
double	myFunction (double x) const
double	trapezoid (double lower, double higher, int n, double &result) const
virtual double	evaluateIt (double lower, double higher) const =0
double	myFunction (double x) const

Detailed Description

Definition at line 30 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.hh.

Constructor & Destructor Documentation

EvtItgAbsIntegrator() [1/2]

EvtItgAbsIntegrator::EvtItgAbsIntegrator

(

const EvtItgAbsFunction &

theFunction

)

Definition at line 39 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc.

                                                                            :
  _myFunction(theFunction)
{}

Referenced by EvtItgAbsIntegrator().

~EvtItgAbsIntegrator() [1/2]

EvtItgAbsIntegrator::~EvtItgAbsIntegrator ( )

virtual

Definition at line 43 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc.

{}

EvtItgAbsIntegrator() [2/2]

EvtItgAbsIntegrator::EvtItgAbsIntegrator

(

const EvtItgAbsFunction &

)

~EvtItgAbsIntegrator() [2/2]

virtual EvtItgAbsIntegrator::~EvtItgAbsIntegrator ( )

virtual

Member Function Documentation

evaluate() [1/2]

double EvtItgAbsIntegrator::evaluate	(	double	lower,
		double	upper
	)		const

Definition at line 52 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc.

                                                             {
 
  double newLower(lower), newUpper(upper);
 
  boundsCheck(newLower, newUpper);
 
  return evaluateIt(newLower, newUpper);
}

Referenced by EvtBtoXsgammaKagan::computeHadronicMass(), and EvtBtoXsgammaRootFinder::GetGaussIntegFcnRoot().

evaluate() [2/2]

double EvtItgAbsIntegrator::evaluate	(	double	lower,
		double	upper
	)		const

evaluateIt() [1/2]

virtual double EvtItgAbsIntegrator::evaluateIt ( double  lower, double  higher  ) const

protectedpure virtual

Implemented in EvtItgSimpsonIntegrator, and EvtItgSimpsonIntegrator.

Referenced by evaluate(), and normalisation().

evaluateIt() [2/2]

virtual double EvtItgAbsIntegrator::evaluateIt ( double  lower, double  higher  ) const

protectedpure virtual

Implemented in EvtItgSimpsonIntegrator, and EvtItgSimpsonIntegrator.

myFunction() [1/2]

double EvtItgAbsIntegrator::myFunction ( double  x ) const

inlineprotected

Definition at line 49 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.hh.

{return _myFunction(x);}

myFunction() [2/2]

double EvtItgAbsIntegrator::myFunction ( double  x ) const

inlineprotected

Definition at line 49 of file BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.hh.

{return _myFunction(x);}

normalisation() [1/2]

double EvtItgAbsIntegrator::normalisation

(

)

const

Definition at line 47 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc.

                                         {
  return evaluateIt(_myFunction.lowerRange(), _myFunction.upperRange());
}

Referenced by EvtBtoXsgammaKagan::computeHadronicMass().

normalisation() [2/2]

double EvtItgAbsIntegrator::normalisation

(

)

const

trapezoid() [1/2]

double EvtItgAbsIntegrator::trapezoid ( double  lower, double  higher, int  n, double &  result  ) const

protected

Definition at line 62 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc.

                                                                                       {
 
  if (n==1) return 0.5*(higher-lower)*(_myFunction(lower) + _myFunction(higher));
  
  int it, j;
  
  for (it=1, j=1;j<n-1;j++) it <<=1;
  
  double itDouble(it);
  
  double sum(0.0);
 
  double deltaX((higher - lower)/itDouble);
  
  double x(lower + 0.5* deltaX);
    
  for (j=1;j<=it;j++){
    sum+=_myFunction(x);
    x+=deltaX;
  }
  
  result = 0.5*(result+(higher - lower)*sum/itDouble);
 
  return result;
}

Referenced by EvtItgSimpsonIntegrator::evaluateIt().

trapezoid() [2/2]

double EvtItgAbsIntegrator::trapezoid ( double  lower, double  higher, int  n, double &  result  ) const

protected

---

The documentation for this class was generated from the following files:

• bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.hh
• BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.hh
• bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc
• BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtItgAbsIntegrator.cc