1#include <Eigen/Core>
2#include <iostream>
3
4using namespace Eigen;
5using namespace std;
6
7int main(void)
8{
9    int const N = 5;
10    MatrixXi A(N,N);
11    A.setRandom();
12    cout << "A =\n" << A << '\n' << endl;
13    cout << "A(:,1..3) =\n" << A.middleCols<3>(1) << endl;
14    return 0;
15}
16