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Diffstat (limited to 'extern/Eigen3/Eigen/src/Eigen2Support/QR.h')
-rw-r--r-- | extern/Eigen3/Eigen/src/Eigen2Support/QR.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/extern/Eigen3/Eigen/src/Eigen2Support/QR.h b/extern/Eigen3/Eigen/src/Eigen2Support/QR.h new file mode 100644 index 00000000000..64f5d5ccb30 --- /dev/null +++ b/extern/Eigen3/Eigen/src/Eigen2Support/QR.h @@ -0,0 +1,79 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> +// Copyright (C) 2011 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/>. + +#ifndef EIGEN2_QR_H +#define EIGEN2_QR_H + +template<typename MatrixType> +class QR : public HouseholderQR<MatrixType> +{ + public: + + typedef HouseholderQR<MatrixType> Base; + typedef Block<const MatrixType, MatrixType::ColsAtCompileTime, MatrixType::ColsAtCompileTime> MatrixRBlockType; + + QR() : Base() {} + + template<typename T> + explicit QR(const T& t) : Base(t) {} + + template<typename OtherDerived, typename ResultType> + bool solve(const MatrixBase<OtherDerived>& b, ResultType *result) const + { + *result = static_cast<const Base*>(this)->solve(b); + return true; + } + + MatrixType matrixQ(void) const { + MatrixType ret = MatrixType::Identity(this->rows(), this->cols()); + ret = this->householderQ() * ret; + return ret; + } + + bool isFullRank() const { + return true; + } + + const TriangularView<MatrixRBlockType, UpperTriangular> + matrixR(void) const + { + int cols = this->cols(); + return MatrixRBlockType(this->matrixQR(), 0, 0, cols, cols).template triangularView<UpperTriangular>(); + } +}; + +/** \return the QR decomposition of \c *this. + * + * \sa class QR + */ +template<typename Derived> +const QR<typename MatrixBase<Derived>::PlainObject> +MatrixBase<Derived>::qr() const +{ + return QR<PlainObject>(eval()); +} + + +#endif // EIGEN2_QR_H |