Random Variates ( random_variate )

Definition

An instance R of the data type random_variate is a non-uniform random number generator. The generation process is governed by an array<int> w. Let [l..r] be the index range of w and let W = $\sum_{i}^{}$w[i] be the total weight. Then any integer i $\in$ [l..h] is generated with probability w[i]/W. The weight function w must be non-negative and W must be non-zero.

#include < LEDA/core/random_variate.h >

Creation

random_variate

R(const array<int>& w)

creates an instance R of type random_variate.

Operations

int

R.generate()

generates i $\in$ [l..h] with probability w[i]/W.