1 #include <iostream> 2 #include <Eigen/Dense> 3 4 using namespace Eigen; 5 6 int main() 7 { 8 MatrixXd m(2,2); 9 m(0,0) = 3; 10 m(1,0) = 2.5; 11 m(0,1) = -1; 12 m(1,1) = m(1,0) + m(0,1); 13 std::cout << "Here is the matrix m:\n" << m << std::endl; 14 VectorXd v(2); 15 v(0) = 4; 16 v(1) = v(0) - 1; 17 std::cout << "Here is the vector v:\n" << v << std::endl; 18 } 19