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    stats_dens_normal

    (PECL stats >= 1.0.0)

    stats_dens_normal — Probability density function of the normal distribution

    説明

    stats_dens_normal(float $x, float $ave, float $stdev): float

    Returns the probability density at x, where the random variable follows the normal distribution of which the mean is ave and the standard deviation is stdev.

    パラメータ

    x

    The value at which the probability density is calculated

    ave

    The mean of the distribution

    stdev

    The standard deviation of the distribution

    戻り値

    The probability density at x or false for failure.

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    User Contributed Notes 2 notes

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    Anonymous
    15 years ago
    I'm not certain that I've figured this one out correctly but it should return the value of a (Gaussian) normal distribution of the given properties at the given location.
    $x - the X-Value to request
    $ave - the 'expected value' (i.e. location of the peak) for the distribution. For most uses this will just be 0.
    $stdev - the standard deviation of the distribution. For most uses this will be 1.
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    Hector
    5 years ago
    This functions will be the equivalent for "DISTR.NORM.N" on excel, like an other user said it's for Gaussian normal distribution.

    $x as value to analyze
    $ave as average
    $stdev as deviation
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