1 #include <iostream> 2 #include <Eigen/Dense> 3 4 using namespace Eigen; 5 main()6int main() 7 { 8 Matrix2d a; 9 a << 1, 2, 10 3, 4; 11 Vector3d v(1,2,3); 12 std::cout << "a * 2.5 =\n" << a * 2.5 << std::endl; 13 std::cout << "0.1 * v =\n" << 0.1 * v << std::endl; 14 std::cout << "Doing v *= 2;" << std::endl; 15 v *= 2; 16 std::cout << "Now v =\n" << v << std::endl; 17 } 18