1 #include <Eigen/Dense> 2 #include <iostream> 3 4 using namespace std; 5 main()6int main() 7 { 8 Eigen::MatrixXf m(3,3); 9 m << 1,2,3, 10 4,5,6, 11 7,8,9; 12 cout << "Here is the matrix m:" << endl << m << endl; 13 cout << "2nd Row: " << m.row(1) << endl; 14 m.col(2) += 3 * m.col(0); 15 cout << "After adding 3 times the first column into the third column, the matrix m is:\n"; 16 cout << m << endl; 17 } 18