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Diffstat (limited to 'third_party/eigen3/Eigen/src/Eigen2Support/QR.h')
-rw-r--r-- | third_party/eigen3/Eigen/src/Eigen2Support/QR.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/third_party/eigen3/Eigen/src/Eigen2Support/QR.h b/third_party/eigen3/Eigen/src/Eigen2Support/QR.h new file mode 100644 index 0000000000..2042c98510 --- /dev/null +++ b/third_party/eigen3/Eigen/src/Eigen2Support/QR.h @@ -0,0 +1,67 @@ +// 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> +// +// 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 +// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. + +#ifndef EIGEN2_QR_H +#define EIGEN2_QR_H + +namespace Eigen { + +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()); +} + +} // end namespace Eigen + +#endif // EIGEN2_QR_H |