stats_rand_gen_gamma
(PECL)
stats_rand_gen_gamma -- Generates random deviates from a gamma distribution
説明
float
stats_rand_gen_gamma ( float a, float r )
Generates random deviates from the gamma distribution whose density is
(A**R)/Gamma(R) * X**(R-1) * Exp(-A*X).
パラメータ
- a
location parameter of Gamma distribution (a
> 0).
- r
shape parameter of Gamma distribution (r >
0).
返り値
What the function returns, first on success, then on failure. See
also the &return.success; entity