| // SPDX-FileCopyrightText: The Eigen Authors | |
| // SPDX-License-Identifier: MPL-2.0 | |
| int n = 10000; | |
| VectorXd x(n), b(n); | |
| SparseMatrix<double> A(n, n); | |
| /* ... fill A and b ... */ | |
| BiCGSTAB<SparseMatrix<double> > solver; | |
| solver.compute(A); | |
| x = solver.solve(b); | |
| std::cout << "#iterations: " << solver.iterations() << std::endl; | |
| std::cout << "estimated error: " << solver.error() << std::endl; | |
| /* ... update b ... */ | |
| x = solver.solve(b); // solve again |