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update : 2015.11.03
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stats_rand_gen_f(PECL stats >= 1.0.0) stats_rand_gen_f — Generates a random deviate 설명
float stats_rand_gen_f
( float
$dfn
, float $dfd
)Generates a random deviate from the F (variance ratio) distribution with "dfn" degrees of freedom in the numerator and "dfd" degrees of freedom in the denominator. Method : directly generates ratio of chisquare variates. 인수
반환값
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