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#include <Eigen/Core>
#include <iostream>
using namespace Eigen;
int main()
{
for (int size=1; size<=4; ++size)
{
MatrixXi m(size,size+1); // a (size)x(size+1)-matrix of int's
for (int j=0; j<m.cols(); ++j) // loop over columns
for (int i=0; i<m.rows(); ++i) // loop over rows
m(i,j) = i+j*size; // to access matrix coefficients,
// use operator()(int,int)
std::cout << m << "\n\n";
}
VectorXf v(4); // a vector of 4 float's
// to access vector coefficients, use either operator () or operator []
v[0] = 1; v[1] = 2; v(2) = 3; v(3) = 4;
std::cout << "\nv:\n" << v << std::endl;
}
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