PHP AChiSq Examples

Example #1

File: tree.php Project: sdesimone/bigml-php

function regression_error($distribution_variance, $population, $r_z = 1.96)
{
    /*
       Computes the variance error
    */
    if ($population > 0) {
        $stats = new Stats();
        $ppf = AChiSq($stats::erf($r_z / sqrt(2)), $population);
        if ($ppf != 0) {
            $error = $distribution_variance * ($population - 1) / $ppf;
            $error = $error * pow(sqrt($population) + $r_z, 2);
            return sqrt($error / $population);
        }
    }
    return NAN;
}

Example #2

File: ChiSquare.php Project: sdesimone/bigml-php

function calppm($conf, $fails, $total)
{
    $E5 = $conf / 100;
    $F5 = $fails;
    $G5 = $total;
    $I5 = AChiSq(1 - $E5, 2 * ($F5 + 1)) * 1000000 / (2 * $G5);
    return round($I5);
}