1*bf2c3715SXin Li MatrixXf A(2,2), B(3,2); 2*bf2c3715SXin Li B << 2, 0, 0, 3, 1, 1; 3*bf2c3715SXin Li A << 2, 0, 0, -2; 4*bf2c3715SXin Li A = (B * A).eval().cwiseAbs(); 5*bf2c3715SXin Li cout << A; 6