Math

Files
file	psRandom.h
	Random Number Generators This file will hold the prototypes for procedures which allocate, free, and evaluate random number Generators.
file	psRandom.h
	Random Number Generators This file will hold the prototypes for procedures which allocate, free, and evaluate random number Generators.
Data Structures
struct	psRandom
	Data structure for psRandom. More...
Enumerations
enum	psRandomType { PS_RANDOM_TAUS }
	Enumeration containing a flag for psRandom types. More...
Functions
psU64	p_psRandomGetSystemSeed ()
psRandom *	psRandomAlloc (psRandomType type, unsigned long seed)
	Allocates a psRandom struct.
void	psRandomReset (psRandom *rand, unsigned long seed)
	Resets an existing psRandom struct.
double	psRandomUniform (const psRandom *r)
	Random number generator based on a uniform distribution on [0,1).
double	psRandomGaussian (const psRandom *r)
	Random number generator based on a Gaussian deviate, N(0,1).
double	p_psRandomGaussian (const psRandom *r, double sigma)
	Random number generator based on a Gaussian deviate, N(0,1).
double	psRandomPoisson (const psRandom *r, double mean)
	Random number generator based on a Poisson distribution with the given mean.

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Enumeration Type Documentation

enum psRandomType

Enumeration containing a flag for psRandom types. Enumerator: PS_RANDOM_TAUS  A maximally equidistributed combined Tausworthe generator. Definition at line 36 of file psRandom.h.

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Function Documentation

double p_psRandomGaussian (  const psRandom *  r, double  sigma )

Random number generator based on a Gaussian deviate, N(0,1). Uses gsl_ran_gaussian. XXX: I created this since the above psLib spec for p_psRandomGaussian had no argument for sigma. Verify that with IfA. Returns: double: Random number. Parameters: r  psRandom struct for RNG

psU64 p_psRandomGetSystemSeed (   )

psRandom* psRandomAlloc (  psRandomType  type, unsigned long  seed )

Allocates a psRandom struct. Returns: psRandom*: A new psRandom structure. Parameters: type  The type of RNG seed  Known value with which to seed the RNG

double psRandomGaussian (  const psRandom *  r  )

Random number generator based on a Gaussian deviate, N(0,1). Uses gsl_ran_gaussian. Returns: double: Random number. Parameters: r  psRandom struct for RNG

double psRandomPoisson (  const psRandom *  r, double  mean )

Random number generator based on a Poisson distribution with the given mean. Uses gsl_ran_poisson. Returns: double: Random number. Parameters: r  psRandom struct for RNG mean  Mean value

void psRandomReset (  psRandom *  rand, unsigned long  seed )

Resets an existing psRandom struct. Returns: void Parameters: rand  Existing psRandom struct to reset seed  Known value with which to seed the RNG

double psRandomUniform (  const psRandom *  r  )

Random number generator based on a uniform distribution on [0,1). Uses gsl_rng_uniform. Returns: double: Random number. Parameters: r  psRandom struct for RNG

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