Tutorial_BlockOperations_vector.cpp
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	#include <Eigen/Dense>
	#include <iostream>

	using namespace std;

	int main()
	{
	Eigen::ArrayXf v(6);
	v << 1, 2, 3, 4, 5, 6;
	cout << "v.head(3) =" << endl << v.head(3) << endl << endl;
	cout << "v.tail<3>() = " << endl << v.tail<3>() << endl << endl;
	v.segment(1,4) *= 2;
	cout << "after 'v.segment(1,4) *= 2', v =" << endl << v << endl;
	}