stats_rand_gen_beta
(PECL stats:1.0.0-1.0.2)
stats_rand_gen_beta — Generates beta random deviate
说明
float stats_rand_gen_beta
( float $a
, float $b
)
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
-
- b
-
返回值
