1 #include <Eigen/Dense> 2 #include <iostream> 3 4 using namespace Eigen; 5 using namespace std; 6 main()7int main() 8 { 9 ArrayXXf m(2,2); 10 11 // assign some values coefficient by coefficient 12 m(0,0) = 1.0; m(0,1) = 2.0; 13 m(1,0) = 3.0; m(1,1) = m(0,1) + m(1,0); 14 15 // print values to standard output 16 cout << m << endl << endl; 17 18 // using the comma-initializer is also allowed 19 m << 1.0,2.0, 20 3.0,4.0; 21 22 // print values to standard output 23 cout << m << endl; 24 } 25