Random number generator system. More...

#include <random.hh>

Inheritance diagram for numeric::random::RandomGenerator:

Public Types
typedef double	result_type

Public Types inherited from utility::pointer::ReferenceCount
typedef platform::Size	Size

typedef platform::Size	size_type

Public Member Functions
	~RandomGenerator ()

double	uniform ()

double	gaussian ()
	Get Gaussian distribution random number. More...

int	random_range (int low, int high)
	Returns a random int in the range specified by the arguments. More...

int	get_seed () const
	Return the seed used by this RNG. More...

void	set_seed (std::string const &generator_type, int seed)
	Set the seed and the generator type synchronously. Currently the two supported generator types are "standard" and "mt19937" with the latter being the recommended form. More...

void	set_seed (int seed)
	Return the seed used by this RNG. More...

void	saveState (std::ostream &out)

void	restoreState (std::istream &in)

template<class T >
T const &	random_element (utility::vector1< T > const &v)
	return a random element from a utility::vector1. What is this function doing inside the RandomGenerator class? More...

double	operator() ()

double	min () const

double	max () const

Public Member Functions inherited from utility::pointer::ReferenceCount
	ReferenceCount ()
	Default constructor. More...

virtual	~ReferenceCount ()

Private Member Functions
	RandomGenerator ()

	RandomGenerator (RandomGenerator const &)

Private Attributes
uniform_RG_OP	generator_

bool	gaussian_iset_
	data for Gaussian generation More...

double	gaussian_gset_

Friends
RandomGenerator &	rg ()
	Return the one-per-thread "singleton" random generator. More...

Detailed Description

Random number generator system.

Member Typedef Documentation

typedef double numeric::random::RandomGenerator::result_type

Constructor & Destructor Documentation

numeric::random::RandomGenerator::RandomGenerator ( )

private

numeric::random::RandomGenerator::RandomGenerator ( RandomGenerator const & )

private

numeric::random::RandomGenerator::~RandomGenerator ( )

Member Function Documentation

double numeric::random::RandomGenerator::gaussian ( )

Get Gaussian distribution random number.

SL: this is function is ported from old Rosetta++.

Returns a gaussian random number (normally distributed deviate with zero mean and unit variance) using ran3 as a source of uniform deviates. Always call with the same idum

References: Numerical Recipes, section 7.2, a.k.a. "GASDEV"

Author: JJG 4/01

References gaussian_gset_, gaussian_iset_, numeric::log(), and uniform().

Referenced by numeric::random::gaussian(), operator()(), numeric::random::random_point_on_unit_sphere(), numeric::random::random_rotation_angle(), and numeric::random::random_translation().

int numeric::random::RandomGenerator::get_seed ( ) const

Return the seed used by this RNG.

References generator_.

double numeric::random::RandomGenerator::max ( ) const

inline

double numeric::random::RandomGenerator::min ( ) const

inline

double numeric::random::RandomGenerator::operator() ( )

inline

References gaussian().

template<class T >

T const& numeric::random::RandomGenerator::random_element ( utility::vector1< T > const & v )

inline

return a random element from a utility::vector1. What is this function doing inside the RandomGenerator class?

References random_range().

int numeric::random::RandomGenerator::random_range	(	int	low,
		int	high
	)

Returns a random int in the range specified by the arguments.

Returns a random int in the range specified by the arguments, with both enpoints being included in the possible output.

Author: XA

References numeric::random::uniform().

Referenced by main(), random_element(), numeric::IntervalSet< double >::random_point(), numeric::random::random_range(), and numeric::random::reservoir_sample().

void numeric::random::RandomGenerator::restoreState ( std::istream & in )

References gaussian_gset_, gaussian_iset_, and generator_.

void numeric::random::RandomGenerator::saveState ( std::ostream & out )

References gaussian_gset_, gaussian_iset_, and generator_.

void numeric::random::RandomGenerator::set_seed	(	std::string const &	generator_type,
		int	seed
	)

Set the seed and the generator type synchronously. Currently the two supported generator types are "standard" and "mt19937" with the latter being the recommended form.

References numeric::random::createRG(), and generator_.

Referenced by PerformanceBenchmark::execute().

void numeric::random::RandomGenerator::set_seed ( int seed )

Return the seed used by this RNG.

References generator_.

double numeric::random::RandomGenerator::uniform ( )

Return from range [0, 1] (?) uniform random number

The implementation of random_range leads me to believe this is actually [0, 1), like most other random number generators. -IWD

References generator_.

Referenced by gaussian(), gen_pep_bb_sequential(), mutate_random_residue(), numeric::random::pick_random_index_from_cdf(), numeric::random::random_permutation(), numeric::IntervalSet< double >::random_point(), numeric::random::WeightedSampler::random_sample(), numeric::random::reservoir_sample(), run_pep_prep(), RunPepSpec(), and numeric::random::uniform().