| // SPDX-FileCopyrightText: The Eigen Authors | |
| // SPDX-License-Identifier: MPL-2.0 | |
| Matrix4d m = Vector4d(1, 2, 3, 4).asDiagonal(); | |
| cout << "Here is the matrix m:" << endl << m << endl; | |
| cout << "Here is m.fixed<2, 2>(2, 2):" << endl << m.block<2, 2>(2, 2) << endl; | |
| m.block<2, 2>(2, 0) = m.block<2, 2>(2, 2); | |
| cout << "Now the matrix m is:" << endl << m << endl; |