| // SPDX-FileCopyrightText: The Eigen Authors |
| // SPDX-License-Identifier: MPL-2.0 |
| |
| #include <Eigen/Dense> |
| #include <cmath> |
| #include <iostream> |
| |
| struct GreaterAbs { |
| double operator()(double a, double b) const { |
| using std::abs; |
| return abs(a) < abs(b) ? b : a; |
| } |
| }; |
| |
| int main() { |
| Eigen::MatrixXd m(2, 3); |
| m << -2, 1, 4, 3, -5, 2; |
| |
| std::cout << "matrix:\n" << m << "\n\n"; |
| std::cout << "largest absolute value: " << m.redux(GreaterAbs()) << "\n"; |
| std::cout << "column-wise:\n" << m.colwise().redux(GreaterAbs()) << "\n"; |
| } |
