stats_rand_gen_f

    (PECL stats >= 1.0.0)

    stats_rand_gen_f — Generates a random deviate from the F distribution

    说明

    stats_rand_gen_f(float $dfn, float $dfd): float

    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.

    参数

    dfn

    The degrees of freedom in the numerator

    dfd

    The degrees of freedom in the denominator

    返回值

    A random deviate

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