doc/snippets/MatrixBase_select.cpp

// SPDX-FileCopyrightText: The Eigen Authors
// SPDX-License-Identifier: MPL-2.0

MatrixXi m(3, 3);
m << 1, 2, 3, 4, 5, 6, 7, 8, 9;
m = (m.array() >= 5).select(-m, m);
cout << m << endl;