67 lines
1.7 KiB
67 lines
1.7 KiB
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
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// Copyright (C) 2011 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN2_QR_H
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#define EIGEN2_QR_H
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namespace Eigen {
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template<typename MatrixType>
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class QR : public HouseholderQR<MatrixType>
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{
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public:
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typedef HouseholderQR<MatrixType> Base;
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typedef Block<const MatrixType, MatrixType::ColsAtCompileTime, MatrixType::ColsAtCompileTime> MatrixRBlockType;
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QR() : Base() {}
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template<typename T>
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explicit QR(const T& t) : Base(t) {}
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template<typename OtherDerived, typename ResultType>
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bool solve(const MatrixBase<OtherDerived>& b, ResultType *result) const
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{
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*result = static_cast<const Base*>(this)->solve(b);
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return true;
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}
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MatrixType matrixQ(void) const {
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MatrixType ret = MatrixType::Identity(this->rows(), this->cols());
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ret = this->householderQ() * ret;
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return ret;
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}
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bool isFullRank() const {
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return true;
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}
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const TriangularView<MatrixRBlockType, UpperTriangular>
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matrixR(void) const
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{
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int cols = this->cols();
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return MatrixRBlockType(this->matrixQR(), 0, 0, cols, cols).template triangularView<UpperTriangular>();
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}
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};
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/** \return the QR decomposition of \c *this.
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*
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* \sa class QR
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*/
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template<typename Derived>
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const QR<typename MatrixBase<Derived>::PlainObject>
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MatrixBase<Derived>::qr() const
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{
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return QR<PlainObject>(eval());
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}
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} // end namespace Eigen
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#endif // EIGEN2_QR_H
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