GSparseNumeric.hpp

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/***************************************************************************
 *       GSparseNumeric.hpp - Sparse matrix numeric analysis class         *
 * ----------------------------------------------------------------------- *
 *  copyright (C) 2006-2021 by Juergen Knoedlseder                         *
 * ----------------------------------------------------------------------- *
 *                                                                         *
 *  This program is free software: 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 3 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program 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 General Public License for more details.                           *
 *                                                                         *
 *  You should have received a copy of the GNU General Public License      *
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.  *
 *                                                                         *
 ***************************************************************************/
/**
 * @file GSparseNumeric.hpp
 * @brief Sparse matrix numeric analysis class definition
 * @author Juergen Knoedlseder
 */
 
#ifndef GSPARSENUMERIC_HPP
#define GSPARSENUMERIC_HPP
 
/* __ Includes ___________________________________________________________ */
#include "GMatrixSparse.hpp"
 
/* __ Definitions ________________________________________________________ */
 
/* __ Enumerators ________________________________________________________ */
 
/* __ Structures _________________________________________________________ */
 
/* __ Prototypes _________________________________________________________ */
 
 
/***********************************************************************//**
 * @class GSparseNumeric
 *
 * @brief Sparse matrix numeric analysis class
 ***************************************************************************/
class GSparseNumeric {
 
    // Friend classes
    friend class GMatrixSparse;
 
    // I/O friends
    friend std::ostream& operator<< (std::ostream& os, const GSparseNumeric& n);
 
public:
    // Constructors and destructors
    GSparseNumeric(void);
    virtual ~GSparseNumeric(void);
 
    // Assignment operator
    GSparseNumeric& operator=(const GSparseNumeric& n);
 
    // Methods
    void cholesky_numeric_analysis(const GMatrixSparse& m, const GSparseSymbolic& s);
 
private:
    // Methods
    int cs_ereach(const GMatrixSparse* A, int k, const int* parent, int* s, int* w);
 
    // Data
    GMatrixSparse* m_L;        // L for LU and Cholesky, V for QR
    GMatrixSparse* m_U;        // U for LU, R for QR, not used for Cholesky
    int*           m_pinv;     // partial pivoting for LU
    double*        m_B;        // beta [0..n-1] for QR
    int            m_n_pinv;   // Number of elements in m_pinv
    int            m_n_B;      // Number of elements in m_B
};
 
#endif /* GSPARSENUMERIC_HPP */