class RooRandom

This class provides a static interface for generating random numbers. By default a private copy of TRandom3 is used to generate all random numbers.

Function Members (Methods)

public:

virtual	~RooRandom()
static TClass*	Class()
static Double_t	gaussian(TRandom* generator = randomGenerator())
static UInt_t	integer(UInt_t max, TRandom* generator = randomGenerator())
virtual TClass*	IsA() const
RooRandom&	operator=(const RooRandom&)
static Bool_t	quasi(UInt_t dimension, Double_t[] vector, RooQuasiRandomGenerator* generator = quasiGenerator())
static RooQuasiRandomGenerator*	quasiGenerator()
static TRandom*	randomGenerator()
	RooRandom(const RooRandom&)
static void	setRandomGenerator(TRandom* gen)
virtual void	ShowMembers(TMemberInspector& insp) const
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
static Double_t	uniform(TRandom* generator = randomGenerator())
static void	uniform(UInt_t dimension, Double_t[] vector, TRandom* generator = randomGenerator())

private:

RooRandom()

Data Members

private:

static TRandom*	_theGenerator	random number generator
static RooQuasiRandomGenerator*	_theQuasiGenerator	quasi random number sequence generator
static RooRandom::Guard	guard

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TRandom * randomGenerator()

 Return a pointer to a singleton random-number generator
 implementation. Creates the object the first time it is called.

void setRandomGenerator(TRandom* gen)

 set the random number generator; takes ownership of the object passed as parameter

RooQuasiRandomGenerator * quasiGenerator()

 Return a pointer to a singleton quasi-random generator
 implementation. Creates the object the first time it is called.

Double_t uniform(TRandom* generator = randomGenerator())

 Return a number uniformly distributed from (0,1)

void uniform(UInt_t dimension, Double_t[] vector, TRandom* generator = randomGenerator())

 Fill the vector provided with random numbers uniformly distributed from (0,1)

UInt_t integer(UInt_t max, TRandom* generator = randomGenerator())

 Return an integer uniformly distributed from [0,n-1]

Double_t gaussian(TRandom* generator = randomGenerator())

 Return a Gaussian random variable with mean 0 and variance 1.

Bool_t quasi(UInt_t dimension, Double_t[] vector, RooQuasiRandomGenerator* generator = quasiGenerator())

 Return a quasi-random number in the range (0,1) using the
 Niederreiter base 2 generator described in Bratley, Fox, Niederreiter,
 ACM Trans. Model. Comp. Sim. 2, 195 (1992).

virtual ~RooRandom()

{}

RooRandom()