#include <graphlab/util/random.hpp>

Public Types
typedef boost::lagged_fibonacci607	real_rng_type
typedef boost::mt11213b	discrete_rng_type
typedef boost::rand48	fast_discrete_rng_type

Public Member Functions
void	seed ()
	Seed the generator using the default seed.
void	nondet_seed ()
	Seed the generator nondeterministically.
void	time_seed ()
	Seed the generator using the current time in microseconds.
void	seed (size_t number)
	Seed the random number generator based on a number.
void	seed (generator &other)
	Seed the generator using another generator.
template<typename NumType >
NumType	uniform (const NumType min, const NumType max)
template<typename NumType >
NumType	fast_uniform (const NumType min, const NumType max)
double	gamma (const double alpha=double(1))
double	gaussian (const double mean=double(0), const double stdev=double(1))
double	normal (const double mean=double(0), const double stdev=double(1))
bool	bernoulli (const double p=double(0.5))
bool	fast_bernoulli (const double p=double(0.5))
template<typename Double >
size_t	multinomial (const std::vector< Double > &prb)
template<typename Double >
size_t	multinomial_cdf (const std::vector< Double > &cdf)
template<typename T >
std::vector< T >	permutation (const size_t nelems)
template<typename T >
void	shuffle (std::vector< T > &vec)
template<typename Iterator >
void	shuffle (Iterator begin, Iterator end)

Detailed Description

The generator class is the base underlying type used to generate random numbers. User threads should use the functions provided in the random namespace.

Definition at line 100 of file random.hpp.

Member Function Documentation

template<typename NumType >

NumType graphlab::random::generator::fast_uniform	(	const NumType	min,
		const NumType	max
	)

inline

Generate a random number in the uniform real with range [min, max) or [min, max] if the number type is discrete.

Definition at line 165 of file random.hpp.

double graphlab::random::generator::gamma ( const double alpha = double(1) )

inline

Generate a random number in the uniform real with range [min, max);

Definition at line 178 of file random.hpp.

double graphlab::random::generator::gaussian	(	const double	mean = `double(0)`,
		const double	stdev = `double(1)`
	)

inline

Generate a gaussian random variable with zero mean and unit variance.

Definition at line 191 of file random.hpp.

template<typename Double >

size_t graphlab::random::generator::multinomial ( const std::vector< Double > & prb )

inline

Draw a random number from a multinomial

Definition at line 231 of file random.hpp.

template<typename Double >

size_t graphlab::random::generator::multinomial_cdf ( const std::vector< Double > & cdf )

inline

Generate a draw from a multinomial using a CDF. This is slightly more efficient since normalization is not required and a binary search can be used.

Definition at line 256 of file random.hpp.

double graphlab::random::generator::normal	(	const double	mean = `double(0)`,
		const double	stdev = `double(1)`
	)

inline

Generate a gaussian random variable with zero mean and unit variance.

Definition at line 204 of file random.hpp.

template<typename T >

std::vector<T> graphlab::random::generator::permutation ( const size_t nelems )

inline

Construct a random permutation

Definition at line 267 of file random.hpp.

template<typename T >

void graphlab::random::generator::shuffle ( std::vector< T > & vec )

inline

Shuffle a standard vector

Definition at line 278 of file random.hpp.

template<typename Iterator >

void graphlab::random::generator::shuffle	(	Iterator	begin,
		Iterator	end
	)

inline

Shuffle a range using the begin and end iterators

Definition at line 284 of file random.hpp.

template<typename NumType >

NumType graphlab::random::generator::uniform	(	const NumType	min,
		const NumType	max
	)

inline

Generate a random number in the uniform real with range [min, max) or [min, max] if the number type is discrete.

Definition at line 152 of file random.hpp.

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

graphlab/util/random.hpp
graphlab/util/random.cpp

Public Types

Public Member Functions

Detailed Description

Member Function Documentation