PHP Manual
Statistic 関数
Probability density function of the exponential distribution

stats_dens_exponential

(PECL stats >= 1.0.0)

stats_dens_exponential — Probability density function of the exponential distribution

説明

function stats_dens_exponential(float $x, float $scale): float

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.

関連キーワード:

exponential density stats dens scale Probability float probability chisquare Statistic random variable follows calculated failure

関連する関数・ページ:

function.stats-dens-f function.stats-dens-chisquare function.stats-dens-t function.stats-dens-normal function.stats-dens-cauchy function.stats-dens-weibull