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#include <Eigen/Dense>
#include <iostream>
using namespace Eigen;
using namespace std;
int main()
{
ArrayXXf m(2,2);
// assign some values coefficient by coefficient
m(0,0) = 1.0; m(0,1) = 2.0;
m(1,0) = 3.0; m(1,1) = m(0,1) + m(1,0);
// print values to standard output
cout << m << endl << endl;
// using the comma-initializer is also allowed
m << 1.0,2.0,
3.0,4.0;
// print values to standard output
cout << m << endl;
}
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