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ROOT::Math::GSLRngGFSR4 Class Reference

Lagged Fibonacci generator by Ziff see here

Definition at line 441 of file GSLRndmEngines.h.

## Public Types | |

typedef GSLRandomEngine | BaseType |

## Public Member Functions | |

GSLRngGFSR4 () | |

Public Member Functions inherited from ROOT::Math::GSLRandomEngine | |

GSLRandomEngine () | |

default constructor. | |

GSLRandomEngine (const GSLRandomEngine &eng) | |

Copy constructor : clone the contained GSL generator. | |

GSLRandomEngine (GSLRngWrapper *rng) | |

create from an existing rng. | |

virtual | ~GSLRandomEngine () |

call Terminate() | |

void | Initialize () |

initialize the generator If no rng is present the default one based on Mersenne and Twister is created | |

unsigned long | IntRndm () const |

Generate an integer number between [0,max_generator-1] (including 0 and max-1) if max is larger than available range of algorithm an error message is printed and zero is returned. | |

unsigned long | MaxInt () const |

return the maximum integer +1 a generator can handle | |

unsigned long | MinInt () const |

return the minimum integer a generator can handle typically this value is 0 | |

std::string | Name () const |

return name of generator | |

double | operator() () const |

Generate a random number between ]0,1] 0 is excluded and 1 is included. | |

GSLRandomEngine & | operator= (const GSLRandomEngine &eng) |

Assignment operator : make a deep copy of the contained GSL generator. | |

void | RandomArray (double *begin, double *end) const |

Generate an array of random numbers The iterators points to the random numbers. | |

template<class Iterator > | |

void | RandomArray (Iterator begin, Iterator end) const |

Generate an array of random numbers. | |

double | Rndm () const |

Generate a random number between ]0,1] 0 is excluded and 1 is included. | |

unsigned long | RndmInt (unsigned long max) const |

Generate an integer number between [0,max-1] (including 0 and max-1) if max is larger than available range of algorithm an error message is printed and zero is returned. | |

void | SetSeed (unsigned int seed) const |

set the random generator seed | |

unsigned int | Size () const |

return the state size of generator | |

void | Terminate () |

delete pointer to contained rng | |

double | Gaussian (double sigma) const |

Gaussian distribution - default method is Box-Muller (polar method) | |

double | GaussianZig (double sigma) const |

Gaussian distribution - Ziggurat method. | |

double | GaussianRatio (double sigma) const |

Gaussian distribution - Ratio method. | |

double | GaussianTail (double a, double sigma) const |

Gaussian Tail distribution. | |

void | Gaussian2D (double sigmaX, double sigmaY, double rho, double &x, double &y) const |

Bivariate Gaussian distribution with correlation. | |

void | GaussianND (size_t dim, const double *pars, const double *covmat, double *genpars, double *lmat=nullptr) const |

Multivariate Gaussian distribution. | |

double | Exponential (double mu) const |

Exponential distribution. | |

double | Cauchy (double a) const |

Cauchy distribution. | |

double | Landau () const |

Landau distribution. | |

double | Gamma (double a, double b) const |

Gamma distribution. | |

double | Beta (double a, double b) const |

Beta distribution. | |

double | LogNormal (double zeta, double sigma) const |

Log Normal distribution. | |

double | ChiSquare (double nu) const |

Chi square distribution. | |

double | FDist (double nu1, double nu2) const |

F distribution. | |

double | tDist (double nu) const |

t student distribution | |

double | Rayleigh (double sigma) const |

Rayleigh distribution. | |

double | Logistic (double a) const |

Logistic distribution. | |

double | Pareto (double a, double b) const |

Pareto distribution. | |

void | Dir2D (double &x, double &y) const |

generate random numbers in a 2D circle of radious 1 | |

void | Dir3D (double &x, double &y, double &z) const |

generate random numbers in a 3D sphere of radious 1 | |

unsigned int | Poisson (double mu) const |

Poisson distribution. | |

unsigned int | Binomial (double p, unsigned int n) const |

Binomial distribution. | |

unsigned int | NegativeBinomial (double p, double n) const |

Negative Binomial distribution. | |

std::vector< unsigned int > | Multinomial (unsigned int ntot, const std::vector< double > &p) const |

Multinomial distribution. | |

## Additional Inherited Members | |

Protected Member Functions inherited from ROOT::Math::GSLRandomEngine | |

void | SetType (GSLRngWrapper *r) |

internal method used by the derived class to set the type of generators | |

GSLRngWrapper * | Engine () |

internal method to return the engine Used by class like GSLMCIntegrator to set the engine | |

`#include <Math/GSLRndmEngines.h>`

Inheritance diagram for ROOT::Math::GSLRngGFSR4:

Definition at line 443 of file GSLRndmEngines.h.

ROOT::Math::GSLRngGFSR4::GSLRngGFSR4 | ( | ) |

Definition at line 447 of file GSLRndmEngines.cxx.

Libraries for ROOT::Math::GSLRngGFSR4:

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

- math/mathmore/inc/Math/GSLRndmEngines.h
- math/mathmore/src/GSLRndmEngines.cxx