stats_dens_weibull

(PECL stats >= 1.0.0)

stats_dens_weibull — Probability density function of the Weibull distribution

说明

stats_dens_weibull(float $x, float $a, float $b): float

Returns the probability density at x, where the random variable follows the Weibull distribution of which the shape parameter is a and the scale parameter is b.

参数

x

The value at which the probability density is calculated

a

The shape parameter of the distribution

b

The scale parameter of the distribution

返回值

The probability density at x or false for failure.