diff options
author | Gael Guennebaud <g.gael@free.fr> | 2016-01-23 22:13:54 +0100 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2016-01-23 22:13:54 +0100 |
commit | 0caa4b1531def27bde0ffeb942cc10f9917a47c6 (patch) | |
tree | 206543aa684b2b1eb6063482d933bc0e345a04f3 /test/incomplete_cholesky.cpp | |
parent | cb4e53ff7ff8d49bccc09b41efc193fb64d37a32 (diff) |
bug #1150: make IncompleteCholesky more robust by iteratively increase the shift until the factorization succeed (with at most 10 attempts).
Diffstat (limited to 'test/incomplete_cholesky.cpp')
-rw-r--r-- | test/incomplete_cholesky.cpp | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/test/incomplete_cholesky.cpp b/test/incomplete_cholesky.cpp index 7acad9872..59ffe9259 100644 --- a/test/incomplete_cholesky.cpp +++ b/test/incomplete_cholesky.cpp @@ -1,7 +1,7 @@ // This file is part of Eigen, a lightweight C++ template library // for linear algebra. // -// Copyright (C) 2015 Gael Guennebaud <gael.guennebaud@inria.fr> +// Copyright (C) 2015-2016 Gael Guennebaud <gael.guennebaud@inria.fr> // // This Source Code Form is subject to the terms of the Mozilla // Public License v. 2.0. If a copy of the MPL was not distributed @@ -34,4 +34,32 @@ void test_incomplete_cholesky() CALL_SUBTEST_1(( test_incomplete_cholesky_T<double,int>() )); CALL_SUBTEST_2(( test_incomplete_cholesky_T<std::complex<double>, int>() )); CALL_SUBTEST_3(( test_incomplete_cholesky_T<double,long int>() )); + +#ifdef EIGEN_TEST_PART_1 + // regression for bug 1150 + for(int N = 1; N<20; ++N) + { + Eigen::MatrixXd b( N, N ); + b.setOnes(); + + Eigen::SparseMatrix<double> m( N, N ); + m.reserve(Eigen::VectorXi::Constant(N,4)); + for( int i = 0; i < N; ++i ) + { + m.insert( i, i ) = 1; + m.coeffRef( i, i / 2 ) = 2; + m.coeffRef( i, i / 3 ) = 2; + m.coeffRef( i, i / 4 ) = 2; + } + + Eigen::SparseMatrix<double> A; + A = m * m.transpose(); + + Eigen::ConjugateGradient<Eigen::SparseMatrix<double>, + Eigen::Lower | Eigen::Upper, + Eigen::IncompleteCholesky<double> > solver( A ); + VERIFY(solver.preconditioner().info() == Eigen::Success); + VERIFY(solver.info() == Eigen::Success); + } +#endif } |