1 int rows=5, cols=5; 2 MatrixXf m(rows,cols); 3 m << (Matrix3f() << 1, 2, 3, 4, 5, 6, 7, 8, 9).finished(), 4 MatrixXf::Zero(3,cols-3), 5 MatrixXf::Zero(rows-3,3), 6 MatrixXf::Identity(rows-3,cols-3); 7 cout << m; 8