| // SPDX-FileCopyrightText: The Eigen Authors | |
| // SPDX-License-Identifier: MPL-2.0 | |
| #include <iostream> | |
| #include <Eigen/Dense> | |
| int main() { | |
| Eigen::Matrix2f A; | |
| A << 1, 2, 2, 3; | |
| std::cout << "Here is the matrix A:\n" << A << std::endl; | |
| Eigen::SelfAdjointEigenSolver<Eigen::Matrix2f> eigensolver(A); | |
| if (eigensolver.info() != Eigen::Success) abort(); | |
| std::cout << "The eigenvalues of A are:\n" << eigensolver.eigenvalues() << std::endl; | |
| std::cout << "Here's a matrix whose columns are eigenvectors of A \n" | |
| << "corresponding to these eigenvalues:\n" | |
| << eigensolver.eigenvectors() << std::endl; | |
| } |