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bug #645: patch from Tobias Wood implementing the extraction of eigenvectors in GeneralizedEigenSolver

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This commit is contained in:
Gael Guennebaud
2016-08-23 17:37:38 +02:00
parent 504a4404f1
commit 00b2666853
2 changed files with 125 additions and 66 deletions
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9
test/eigensolver_generalized_real.cpp
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@@ -42,6 +42,11 @@ template<typename MatrixType> void generalized_eigensolver_real(const MatrixType
VectorType realEigenvalues = eig.eigenvalues().real();
std::sort(realEigenvalues.data(), realEigenvalues.data()+realEigenvalues.size());
VERIFY_IS_APPROX(realEigenvalues, symmEig.eigenvalues());
// check eigenvectors
typename GeneralizedEigenSolver<MatrixType>::EigenvectorsType D = eig.eigenvalues().asDiagonal();
typename GeneralizedEigenSolver<MatrixType>::EigenvectorsType V = eig.eigenvectors();
VERIFY_IS_APPROX(spdA*V, spdB*V*D);
}
// non symmetric case:
@@ -54,6 +59,10 @@ template<typename MatrixType> void generalized_eigensolver_real(const MatrixType
tmp /= tmp.norm();
VERIFY_IS_MUCH_SMALLER_THAN( std::abs(tmp.determinant()), Scalar(1) );
}
// check eigenvectors
typename GeneralizedEigenSolver<MatrixType>::EigenvectorsType D = eig.eigenvalues().asDiagonal();
typename GeneralizedEigenSolver<MatrixType>::EigenvectorsType V = eig.eigenvectors();
VERIFY_IS_APPROX(a*V, b*V*D);
}
// regression test for bug 1098