PHP Manual: Probability density function of the Laplace distribution

Description

float stats_dens_laplace(float $x, float $ave, float $stdev)

Returns the probability density at x, where the random variable follows the Laplace distribution of which the location parameter is ave and the scale parameter is stdev.

Parameters

x: The value at which the probability density is calculated
ave: The location parameter of the distribution
stdev: The shape parameter of the distribution

Return Values

The probability density at x or false for failure.