MathPHP\Statistics\Average::splitAtValue PHP 메소드

    private static function splitAtValue(array $numbers, $value) : array
    {
        $lower = [];
        $upper = [];
        $number_equal = 0;
        foreach ($numbers as $number) {
            if ($number < $value) {
                $lower[] = $number;
            } elseif ($number > $value) {
                $upper[] = $number;
            } else {
                $number_equal++;
            }
        }
        return ['lower' => $lower, 'upper' => $upper, 'equal' => $number_equal];
    }