stats_dens_exponential

    (PECL stats >= 1.0.0)

    stats_dens_exponential — Probability density function of the exponential distribution

    说明

    stats_dens_exponential(float $x, float $scale): float

    Returns the probability density at x, where the random variable follows the exponential distribution of which the scale is scale.

    参数

    x

    The value at which the probability density is calculated

    scale

    The scale of the distribution

    返回值

    The probability density at x or false for failure.

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