00001 Matrix4i m = Matrix4i::Random(); 00002 cout << "Here is the matrix m:" << endl << m << endl; 00003 cout << "Here is m.bottomRightCorner(2, 2):" << endl; 00004 cout << m.bottomRightCorner(2, 2) << endl; 00005 m.bottomRightCorner(2, 2).setZero(); 00006 cout << "Now the matrix m is:" << endl << m << endl;