exrandom::unit_exponential_dist< digit_gen, bit_optimized > Class Template Reference

Sample u-rands exactly from the unit exponential distribution. More...

#include <exrandom/unit_exponential_dist.hpp>

Public Member Functions
	unit_exponential_dist (digit_gen &D)
template<typename Generator >
void	generate (Generator &g, u_rand< digit_gen > &x)
template<typename RealType , typename Generator >
RealType	value (Generator &g)
digit_gen &	digit_generator () const

Static Public Attributes
static const uint_t	base

Detailed Description

template<typename digit_gen, bool bit_optimized = true>
class exrandom::unit_exponential_dist< digit_gen, bit_optimized >

Sample u-rands exactly from the unit exponential distribution.

This samples from the unit exponential distribution P(x) = exp(−x) for x > 0. This implements Algorithms E and V.

Template Parameters

digit_gen	the type of digit generator.
bit_optimized	if true use Algorithm E, else use Algorithm V.

This class allows a u-rand to be returned via the unit_exponential_dist::generate member function or a floating point result via the unit_exponential_dist::value<RealType> member function.

See unit_exponential_distribution for a simpler interface to sampling exponential deviates. (But, you can't obtain u-rands with this class and the constructor locks you into a specific floating point type.)

If bit_optimized is true, digit_gen::base must be even.

Examples

count_bits.cpp, and sample_exponential.cpp.

Definition at line 43 of file unit_exponential_dist.hpp.

Constructor & Destructor Documentation

unit_exponential_dist()

template<typename digit_gen, bool bit_optimized = true>

exrandom::unit_exponential_dist< digit_gen, bit_optimized >::unit_exponential_dist ( digit_gen &  D )

inline

The constructor.

Parameters

D	a reference to the digit generator to be used.

Definition at line 50 of file unit_exponential_dist.hpp.

Member Function Documentation

generate()

template<typename digit_gen, bool bit_optimized = true>

template<typename Generator >

void exrandom::unit_exponential_dist< digit_gen, bit_optimized >::generate ( Generator &  g, u_rand< digit_gen > &  x  )

inline

Generate the next deviate as a u_rand.

Template Parameters

Generator

the type of g.

Parameters

	g	the random generator engine.
[out]	x	the u_rand to set.

Definition at line 60 of file unit_exponential_dist.hpp.

value()

template<typename digit_gen, bool bit_optimized = true>

template<typename RealType , typename Generator >

RealType exrandom::unit_exponential_dist< digit_gen, bit_optimized >::value ( Generator &  g )

inline

Generate the next deviate and round it to a floating point number.

Template Parameters

RealType	the floating point type of the result.
Generator	the type of g.

Parameters

g	the random generator engine.

Returns

the exponential deviate.

Definition at line 83 of file unit_exponential_dist.hpp.

digit_generator()

template<typename digit_gen, bool bit_optimized = true>

digit_gen& exrandom::unit_exponential_dist< digit_gen, bit_optimized >::digit_generator ( ) const

inline

Returns

a reference to the digit generator used in the constructor.

Definition at line 91 of file unit_exponential_dist.hpp.

Member Data Documentation

base

template<typename digit_gen, bool bit_optimized = true>

const uint_t exrandom::unit_exponential_dist< digit_gen, bit_optimized >::base

static

The base of the digit generator.

Definition at line 96 of file unit_exponential_dist.hpp.

---

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

• unit_exponential_dist.hpp