stats_rand_gen_ibinomial_negative
(PECL stats >= 1.0.0)
stats_rand_gen_ibinomial_negative — Generates a random deviate from the negative binomial distribution
说明
stats_rand_gen_ibinomial_negative
( int
$n
, float $p
) : int
Returns a random deviate from a negative binomial distribution where the number of success is
n and the success rate is p.
参数
-
n -
The number of success
-
p -
The success rate
返回值
A random deviate, which is the number of failure.