stats_dens_f

    (PECL stats >= 1.0.0)

    stats_dens_f — Probability density function of the F distribution

    说明

    function stats_dens_f(float $x, float $dfr1, float $dfr2): float

    Returns the probability density at x, where the random variable follows the F distribution of which the degree of freedoms are dfr1 and dfr2.

    参数

    x
    The value at which the probability density is calculated
    dfr1
    The degree of freedom of the distribution
    dfr2
    The degree of freedom of the distribution

    返回值

    The probability density at x or false for failure.

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