#include <GridRandomizer.hh>

Public Member Functions
template<class Array >
	GridRandomizer (const Array &gridData, const BoxND< double > &gridBoundary, const unsigned interpolationDegree)

	GridRandomizer (const GridRandomizer &)

GridRandomizer &	operator= (const GridRandomizer &)

bool	operator== (const GridRandomizer &r) const

bool	operator!= (const GridRandomizer &r) const

const ArrayND< double > &	gridData () const

const BoxND< double > &	gridBoundary () const

unsigned	interpolationDegree () const

unsigned	dim () const

double	density (const double *x, unsigned xLen) const

void	generate (const double uniformRandomInput, unsigned bufLen, double resultBuf) const

Detailed Description

Class for generating random numbers according to a multivariate distribution tabulated on a rectangular grid.

Constructor & Destructor Documentation

◆ GridRandomizer()

template<class Array >

npstat::GridRandomizer::GridRandomizer	(	const Array &	gridData,
		const BoxND< double > &	gridBoundary,
		const unsigned	interpolationDegree
	)

inline

Main constructor. "interpolationDegree" may be either 0 or 1. The function values are assumed to be given in the centers of the bins. The density represented by "gridData" will be internally normalized using grid boundaries to determine the support of the density.

Member Function Documentation

◆ density()

double npstat::GridRandomizer::density	(	const double *	x,
		unsigned	xLen
	)		const

Probability density

◆ generate()

void npstat::GridRandomizer::generate	(	const double *	uniformRandomInput,
		unsigned	bufLen,
		double *	resultBuf
	)		const

Generate random numbers according to the density provided in the constructor.

In this method, "bufLen" should not necessarily be equal to the grid dimensionality. When "bufLen" is smaller, the random numbers are efficiently generated for dimensions 0, 1, ..., bufLen - 1. When "bufLen" is larger, only the first "dim()" elements of the "resultBuf" array are filled.

◆ gridData()

const ArrayND<double>& npstat::GridRandomizer::gridData ( ) const