MathPHP\LinearAlgebra\Matrix::scalarMultiply PHP Method

    public function scalarMultiply($λ) : Matrix
    {
        if (!is_numeric($λ)) {
            throw new Exception\BadParameterException('Parameter λ is not a number');
        }
        $R = [];
        for ($i = 0; $i < $this->m; $i++) {
            for ($j = 0; $j < $this->n; $j++) {
                $R[$i][$j] = $this->A[$i][$j] * $λ;
            }
        }
        return MatrixFactory::create($R);
    }