| public static incompleteBeta ( $x, $a, $b ) : number | ||
| $x | Upper limit of the integration 0 ≦ x ≦ 1 | |
| $a | Shape parameter a > 0 | |
| $b | Shape parameter b > 0 | |
| return | number | |
public static function incompleteBeta($x, $a, $b)
{
return self::regularizedIncompleteBeta($x, $a, $b) * self::beta($a, $b);
}