graphlab::random::generator Class Reference

#include <random.hpp>

List of all members.

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 var=double(1))
bool	bernoulli (const double p=double(0.5))
bool	fast_bernoulli (const double p=double(0.5))
size_t	multinomial (const std::vector< double > &prb)
template<typename T >
void	shuffle (std::vector< T > &vec)
template<typename Iterator >
void	shuffle (Iterator begin, Iterator end)

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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 95 of file random.hpp.

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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 156 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 169 of file random.hpp.

double graphlab::random::generator::gaussian	(	const double	mean = double(0),
		const double	var = double(1)
	)			[inline]

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

Definition at line 181 of file random.hpp.

size_t graphlab::random::generator::multinomial

(

const std::vector< double > &

prb

)

[inline]

Draw a random number from a multinomial

Definition at line 210 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 239 of file random.hpp.

template<typename T >

void graphlab::random::generator::shuffle

(

std::vector< T > &

vec

)

[inline]

Shuffle a standard vector

Definition at line 233 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 143 of file random.hpp.

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

• src/graphlab/util/random.hpp