sample_exponential

float  sample_exponential(float u)

float  sample_exponential(float mean, float u)

float  sample_exponential(float origmean, float maxvalue, float u)

u

A number in the range [0,1).

mean

The mean of the distribution, or 1 if not specified.

origmean

The mean the distribution would have, were it not for maxvalue, limiting the range.

maxvalue

When given, instead of sampling the full exponential distribution, the distribution with its range limited to [0,maxvalue] will be sampled.

Samples the exponential distribution with the specified mean, optionally with a maxvalue. Given uniform random u values in [0,1), this will return exponentially distributed random numbers. The return value will be monotone increasing with respect to u.