Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type Struct Reference

Parameter set for the distribution. More...

#include <PRNGDistribution.hpp>

Public Types
using	distribution_type = PiecewiseConstantDistribution< RealType >

Public Member Functions
	param_type ()
	Default constructor. Creates uniform distribution over [0, 1).
template<typename InputIteratorB , typename InputIteratorW >
	param_type (InputIteratorB first_b, InputIteratorB last_b, InputIteratorW first_w)
	Constructs from interval boundaries and density weights.
template<typename UnaryOperation >
	param_type (std::initializer_list< RealType > bl, UnaryOperation fw)
	Constructs from interval boundaries and weight function.
template<typename UnaryOperation >
	param_type (size_t nw, RealType xmin, RealType xmax, UnaryOperation fw)
	Constructs with evenly-spaced intervals and weight function.
std::vector< RealType >	intervals () const
	Returns the interval boundaries.
std::vector< double >	densities () const
	Returns the density values for each interval.

Public Attributes
std::vector< RealType >	m_int
	Interval boundaries.
std::vector< double >	m_den
	Normalized densities for each interval.
std::vector< double >	m_cp
	Cumulative probabilities for sampling.

Friends
class	PiecewiseConstantDistribution< RealType >
bool	operator== (const param_type &lhs, const param_type &rhs)
bool	operator!= (const param_type &lhs, const param_type &rhs)

Detailed Description

template<typename RealType = double>
struct Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type

Parameter set for the distribution.

Stores interval boundaries, density values, and cumulative probabilities for efficient sampling.

Member Typedef Documentation

distribution_type

template<typename RealType = double>

using Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::distribution_type = PiecewiseConstantDistribution<RealType>

Constructor & Destructor Documentation

param_type() [1/4]

template<typename RealType = double>

Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::param_type ( )

inline

Default constructor. Creates uniform distribution over [0, 1).

param_type() [2/4]

template<typename RealType = double>

template<typename InputIteratorB , typename InputIteratorW >

Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::param_type ( InputIteratorB  first_b, InputIteratorB  last_b, InputIteratorW  first_w  )

inline

Constructs from interval boundaries and density weights.

The density for interval i is given by the i-th weight. Weights are normalized automatically.

Template Parameters

InputIteratorB	Iterator type for boundaries
InputIteratorW	Iterator type for weights

Parameters

first_b	Iterator to first boundary
last_b	Iterator past last boundary (n+1 boundaries for n intervals)
first_w	Iterator to first weight (n weights for n intervals)

param_type() [3/4]

template<typename RealType = double>

template<typename UnaryOperation >

Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::param_type ( std::initializer_list< RealType >  bl, UnaryOperation  fw  )

inline

Constructs from interval boundaries and weight function.

Evaluates the weight function at the midpoint of each interval.

Template Parameters

UnaryOperation

Function type: RealType -> double

Parameters

bl	Initializer list of interval boundaries
fw	Weight function evaluated at interval midpoints

param_type() [4/4]

template<typename RealType = double>

template<typename UnaryOperation >

Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::param_type ( size_t  nw, RealType  xmin, RealType  xmax, UnaryOperation  fw  )

inline

Constructs with evenly-spaced intervals and weight function.

Creates nw intervals of equal width between xmin and xmax, evaluating the weight function at each interval's midpoint.

Template Parameters

UnaryOperation

Function type: RealType -> double

Parameters

nw	Number of intervals
xmin	Minimum boundary value
xmax	Maximum boundary value
fw	Weight function evaluated at interval midpoints

Member Function Documentation

densities()

template<typename RealType = double>

std::vector< double > Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::densities ( ) const

inline

Returns the density values for each interval.

Returns

Vector of normalized densities

intervals()

template<typename RealType = double>

std::vector< RealType > Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::intervals ( ) const

inline

Returns the interval boundaries.

Returns

Vector of interval boundary values

Friends And Related Symbol Documentation

operator!=

template<typename RealType = double>

bool operator!= ( const param_type &  lhs, const param_type &  rhs  )

friend

operator==

template<typename RealType = double>

bool operator== ( const param_type &  lhs, const param_type &  rhs  )

friend

PiecewiseConstantDistribution< RealType >

template<typename RealType = double>

friend class PiecewiseConstantDistribution< RealType >

friend

Member Data Documentation

m_cp

template<typename RealType = double>

std::vector<double> Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::m_cp

Cumulative probabilities for sampling.

m_den

template<typename RealType = double>

std::vector<double> Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::m_den

Normalized densities for each interval.

m_int

template<typename RealType = double>

std::vector<RealType> Infinity::Engine::PiecewiseConstantDistribution< RealType >::param_type::m_int

Interval boundaries.