1 #include <iostream>
2 #include <Eigen/Dense>
3 
4 using namespace Eigen;
5 
main()6 int 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