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    stats_dens_normal

    (PECL stats >= 1.0.0)

    stats_dens_normal — Not documented

    설명

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

    이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.

    인수

    x

    ave

    stdev

    반환값

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    User Contributed Notes 3 notes

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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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    0
    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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    -6
    Anonymous
    15 years ago
    There's a way to try it out:

    <?php
    ...
    echo    "<pre>\n";
    for(    $x=-2;$x<=2;$x+=0.1){
      echo    "$i; ".stats_dens_normal($x,1,1)."\n";
    }
    echo    "</pre>\n";
    ?>

    Observe the result (to determine yourself), or
    save it as "stats_dens_normal.csv",
    load it into Open Office and make a graph of it
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