1 #include <iostream>
2 #include <Eigen/Dense>
3 
4 using namespace Eigen;
main()5 int main()
6 {
7   Matrix2d mat;
8   mat << 1, 2,
9          3, 4;
10   Vector2d u(-1,1), v(2,0);
11   std::cout << "Here is mat*mat:\n" << mat*mat << std::endl;
12   std::cout << "Here is mat*u:\n" << mat*u << std::endl;
13   std::cout << "Here is u^T*mat:\n" << u.transpose()*mat << std::endl;
14   std::cout << "Here is u^T*v:\n" << u.transpose()*v << std::endl;
15   std::cout << "Here is u*v^T:\n" << u*v.transpose() << std::endl;
16   std::cout << "Let's multiply mat by itself" << std::endl;
17   mat = mat*mat;
18   std::cout << "Now mat is mat:\n" << mat << std::endl;
19 }
20