stats_dens_exponential

Probability density function of the exponential distribution

説明

float stats_dens_exponential(float $x, float $scale)

Returns the probability density at x, where the random variable follows the exponential distribution of which the scale is scale.

パラメータ

x

The value at which the probability density is calculated

scale

The scale of the distribution

戻り値

The probability density at x or false for failure.