stats_rand_gen_noncentral_f
(PECL stats:1.0.0-1.0.2)
stats_rand_gen_noncentral_f — Generates a random deviate from the noncentral F (variance ratio) distribution with "dfn" degrees of freedom in the numerator, and "dfd" degrees of freedom in the denominator, and noncentrality parameter "xnonc". Method : directly generates ratio of noncentral numerator chisquare variate to central denominator chisquare variate.
說明
float stats_rand_gen_noncentral_f
( float $dfn
, float $dfd
, float $xnonc
)
Warning
此函式目前沒有參考文件；只有引數列表。
參數
- dfn
-
- dfd
-
- xnonc
-
Return值