17faaa9f3f0df9d23790277834d426c3d992ac3baCarlos HernandezMatrix4i m = Matrix4i::Random(); 27faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezcout << "Here is the matrix m:" << endl << m << endl; 37faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezcout << "Here is the block:" << endl << m.block<2, Dynamic>(1, 1, 2, 3) << endl; 47faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezm.block<2, Dynamic>(1, 1, 2, 3).setZero(); 57faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandezcout << "Now the matrix m is:" << endl << m << endl; 6