# stats_rand_gen_beta

(PECL stats >= 1.0.0)

stats_rand_gen_beta — Generates a random deviate from the beta distribution

### 说明

stats_rand_gen_beta ( float `$a` , float `$b` ) : float

Returns a random deviate from the beta distribution with parameters A and B. The density of the beta is x^(a-1) * (1-x)^(b-1) / B(a,b) for 0 < x <. Method R. C. H. Cheng.

### 参数

`a`

  The shape parameter of the beta distribution

`b`

  The shape parameter of the beta distribution

### 返回值

A random deviate