CLHEP::RandBinomialFixedP Class Reference

#include <RandBinomialFixedP.h>

Inheritance diagram for CLHEP::RandBinomialFixedP:

Collaboration diagram for CLHEP::RandBinomialFixedP:

Public Member Functions
	RandBinomialFixedP (HepRandomEngine &anEngine, long n=1, double p=0.5, long Nmaxlookup=10)
	RandBinomialFixedP (HepRandomEngine *anEngine, long n=1, double p=0.5, long Nmaxlookup=10)
virtual	~RandBinomialFixedP ()
void	initLookupTable (long Nmaxlookup, double p)
double	fire ()
double	fire (long n)
double	fire (HepRandomEngine *anEngine, long n)
void	fireArray (const int size, double *vect)
void	fireArray (const int size, double *vect, long n)
double	operator() ()
double	operator() (long n)
std::string	name () const

Static Public Member Functions
static std::string	distributionName ()
static double	shoot ()=delete
static double	shoot (long n, double p)=delete
static void	shootArray (const int size, double *vect, long n=1, double p=0.5)=delete
static double	shoot (HepRandomEngine *anEngine)=delete
static double	shoot (HepRandomEngine *anEngine, long n, double p)=delete
static void	shootArray (HepRandomEngine *anEngine, const int size, double *vect, long n=1, double p=0.5)=delete

Protected Attributes
std::vector< std::vector< double > >	LookupTable

Detailed Description

Author

Definition at line 18 of file RandBinomialFixedP.h.

Constructor & Destructor Documentation

RandBinomialFixedP() [1/2]

CLHEP::RandBinomialFixedP::RandBinomialFixedP ( HepRandomEngine & anEngine, long n = 1, double p = 0.5, long Nmaxlookup = 10 )

inline

RandBinomialFixedP() [2/2]

CLHEP::RandBinomialFixedP::RandBinomialFixedP ( HepRandomEngine * anEngine, long n = 1, double p = 0.5, long Nmaxlookup = 10 )

inline

~RandBinomialFixedP()

CLHEP::RandBinomialFixedP::~RandBinomialFixedP ( )

virtual

Definition at line 16 of file RandBinomialFixedP.cxx.

                                        {
}

Member Function Documentation

distributionName()

std::string CLHEP::RandBinomialFixedP::distributionName ( )

inlinestatic

Definition at line 57 of file RandBinomialFixedP.h.

{return "RandBinomialFixedP";}  

fire() [1/3]

double CLHEP::RandBinomialFixedP::fire ( )

inline

fire() [2/3]

double CLHEP::RandBinomialFixedP::fire	(	HepRandomEngine *	anEngine,
		long	n )

Definition at line 40 of file RandBinomialFixedP.cxx.

                                                                   {
  if(n==1) {
    double prop=anEngine->flat();
    if(prop>defaultP) return 0;
    return 1;
  }
  if(n>(long)LookupTable.size()) return genBinomial( anEngine, n, defaultP );
  
  auto& table=LookupTable[n-1];
  
  double prop=anEngine->flat();
  auto itk = std::upper_bound(table.begin(),table.end(),prop);
  return std::distance(table.begin(),itk);
}

fire() [3/3]

double CLHEP::RandBinomialFixedP::fire

(

long

n

)

fireArray() [1/2]

void CLHEP::RandBinomialFixedP::fireArray	(	const int	size,
		double *	vect )

Definition at line 55 of file RandBinomialFixedP.cxx.

{
  for( double* v = vect; v != vect+size; ++v )
    *v = fire(defaultN);
}

fireArray() [2/2]

void CLHEP::RandBinomialFixedP::fireArray	(	const int	size,
		double *	vect,
		long	n )

Definition at line 61 of file RandBinomialFixedP.cxx.

{
  for( double* v = vect; v != vect+size; ++v )
    *v = fire(n);
}

initLookupTable()

void CLHEP::RandBinomialFixedP::initLookupTable	(	long	Nmaxlookup,
		double	p )

Definition at line 23 of file RandBinomialFixedP.cxx.

                                                                  {
  defaultP=p;
  LookupTable.resize(Nmaxlookup);
  for(unsigned int n=1;n<=Nmaxlookup;++n) {
    unsigned int in=n-1;
    double q=1-p;
    LookupTable[in].resize(n);
    //LookupTable[in][n]=1 always, so don't need to store
    for(unsigned int k=0;k<n;++k) {
      //p(k;n,p)=n!/(k!*(n-k)!)*p^k*(1-p)^(n-k)
      double prop=binom(n,k)*std::pow(p,k)*std::pow(q,n-k);
      if(k>0) prop+=LookupTable[in][k-1];
      LookupTable[in][k]=prop;
    }
  }
}

name()

std::string CLHEP::RandBinomialFixedP::name

(

)

const

Definition at line 14 of file RandBinomialFixedP.cxx.

{return "RandBinomialFixedP";}

operator()() [1/2]

double CLHEP::RandBinomialFixedP::operator() ( )

inline

operator()() [2/2]

double CLHEP::RandBinomialFixedP::operator() ( long n )

inline

shoot() [1/4]

double CLHEP::RandBinomialFixedP::shoot ( )

staticdelete

shoot() [2/4]

double CLHEP::RandBinomialFixedP::shoot ( HepRandomEngine * anEngine )

inlinestaticdelete

shoot() [3/4]

double CLHEP::RandBinomialFixedP::shoot ( HepRandomEngine * anEngine, long n, double p )

staticdelete

shoot() [4/4]

double CLHEP::RandBinomialFixedP::shoot ( long n, double p )

staticdelete

shootArray() [1/2]

void CLHEP::RandBinomialFixedP::shootArray ( const int size, double * vect, long n = 1, double p = 0.5 )

staticdelete

shootArray() [2/2]

void CLHEP::RandBinomialFixedP::shootArray ( HepRandomEngine * anEngine, const int size, double * vect, long n = 1, double p = 0.5 )

staticdelete

Member Data Documentation

LookupTable

std::vector< std::vector< double > > CLHEP::RandBinomialFixedP::LookupTable

protected

Definition at line 74 of file RandBinomialFixedP.h.

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

• RandBinomialFixedP.h
• RandBinomialFixedP.cxx