MathPHP\LinearAlgebra\Matrix::rowAdd PHP 메소드

    public function rowAdd(int $mᵢ, int $mⱼ, int $k) : Matrix
    {
        if ($mᵢ >= $this->m || $mⱼ >= $this->m) {
            throw new Exception\MatrixException('Row to add does not exist');
        }
        if ($k == 0) {
            throw new Exception\BadParameterException('Multiplication factor k must not be 0');
        }
        $n = $this->n;
        $R = $this->A;
        for ($j = 0; $j < $n; $j++) {
            $R[$mⱼ][$j] += $R[$mᵢ][$j] * $k;
        }
        return MatrixFactory::create($R);
    }