MathPHP\Probability\Distribution\Continuous\Logistic::PDF PHP Метод

    public static function PDF($x, $μ, $s)
    {
        Support::checkLimits(self::LIMITS, ['x' => $x, 'μ' => $μ, 's' => $s]);
        $ℯ＾⁻⁽x⁻μ⁾／s = exp(-($x - $μ) / $s);
        return $ℯ＾⁻⁽x⁻μ⁾／s / ($s * pow(1 + $ℯ＾⁻⁽x⁻μ⁾／s, 2));
    }