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Diffstat (limited to 'test/upperbidiagonalization.cpp')
-rw-r--r-- | test/upperbidiagonalization.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/test/upperbidiagonalization.cpp b/test/upperbidiagonalization.cpp new file mode 100644 index 000000000..e6f66a2d5 --- /dev/null +++ b/test/upperbidiagonalization.cpp @@ -0,0 +1,57 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2010 Benoit Jacob <jacob.benoit.1@gmail.com> +// +// Eigen is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 3 of the License, or (at your option) any later version. +// +// Alternatively, you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#include "main.h" +#include <Eigen/SVD> +#include <Eigen/LU> + +template<typename MatrixType> void upperbidiag(const MatrixType& m) +{ + int rows = m.rows(); + int cols = m.cols(); + + typedef typename MatrixType::Scalar Scalar; + typedef Matrix<typename MatrixType::RealScalar, MatrixType::RowsAtCompileTime, MatrixType::ColsAtCompileTime> RealMatrixType; + + MatrixType a = MatrixType::Random(rows,cols); + UpperBidiagonalization<MatrixType> ubd(a); + RealMatrixType b(rows, cols); + b.setZero(); + b.block(0,0,cols,cols) = ubd.bidiagonal(); + MatrixType c = ubd.householderU() * b.template cast<Scalar>() * ubd.householderV().adjoint(); + VERIFY_IS_APPROX(a,c); +} + +void test_upperbidiagonalization() +{ + for(int i = 0; i < g_repeat; i++) { + CALL_SUBTEST_1( upperbidiag(MatrixXf(3,3)) ); + CALL_SUBTEST_2( upperbidiag(MatrixXd(17,12)) ); + CALL_SUBTEST_3( upperbidiag(MatrixXcf(20,20)) ); + CALL_SUBTEST_4( upperbidiag(MatrixXcd(16,15)) ); + CALL_SUBTEST_5( upperbidiag(Matrix<float,6,4>()) ); + CALL_SUBTEST_6( upperbidiag(Matrix<float,5,5>()) ); + CALL_SUBTEST_7( upperbidiag(Matrix<double,4,3>()) ); + } +} |