MathPHP\Probability\Distribution\Continuous\DiracDelta::PDF PHP 메소드

‾ | +∞, x = 0 δ(x) = < | 0, x ≠ 0 \_

public static PDF ( number $x ) : number
$x	number
리턴	number	probability

    public static function PDF($x)
    {
        if ($x == 0) {
            return \INF;
        } else {
            return 0;
        }
    }

DiracDelta