1#include <Eigen/Dense>
2#include <iostream>
3
4using namespace std;
5
6int main()
7{
8  Eigen::ArrayXf v(6);
9  v << 1, 2, 3, 4, 5, 6;
10  cout << "v.head(3) =" << endl << v.head(3) << endl << endl;
11  cout << "v.tail<3>() = " << endl << v.tail<3>() << endl << endl;
12  v.segment(1,4) *= 2;
13  cout << "after 'v.segment(1,4) *= 2', v =" << endl << v << endl;
14}
15