/* -*- mode: c++ -*- 
*/
/* 

    GIFT, a flexible content based image retrieval system.
    Copyright (C) 1998, 1999, 2000 CUI, University of Geneva

    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 2 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, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
// -*- mode: c++ -*-
#ifndef _CMATRIXWITHEIGENVECTORS
#define _CMATRIXWITHEIGENVECTORS

#include "CMatrix.h"
/**
   A CMatrix with a CMatrix of eigenvectors in it.
   The goal of this is to pick the "best" eigenvector
   with respect to our matrix of mutual trust.

   Algorithm for calculating eigenvectors comes from
   numerical recipes.

   define:_CMATRIXWITHEIGENVECTORS_TEST to get a test program with it (main)
 */
class CMatrixWithEigenVectors.html">CMatrixWithEigenVectors:public CMatrix{
  /** are the eigenvectors of this current? */
  bool mIsCurrentEigenVectors;
  /** the eigenvectors of this matrix */
  CMatrix* mEigenVectors;
  /** */
  vector<float> mEigenValues;
  /** the number of jacobi rotations */
  int mNumberOfRotations;
public:
  /** */
  CMatrixWithEigenVectors(int inSize);
  /**
     Calculate the eigenvectors for this matrix and store them
     in mEigenValues; The corresponding Eigenvectors go to
     mEigenVectors.
     
     Algorithm taken from numerical recipes
     kept semantics intact, but tried to do about
     everything differently.
     (pages 463-469 "Numerical recipes in C", 2nd edition)

     Parameter is the size of the upper left submatrix
     for which the eigenvectors are calculated. 
     mEigenvectors will have this size as well as mEigenValues
  */
  void calculateEigenVectors(int inSize);
  /** 
      calls calculateEigenVectors(mSize)
   */
  void calculateEigenVectors();

  /** get a reference to the eigenvectors */
  const CMatrix& getEigenVectors()const;
  /** get a reference to the eigenvectors */
  const vector<float>& getEigenValues()const;
  /** generating diagnostic output:
      Matrix and its Eigenvectors*/
  friend ostream& operator<<(ostream& outStream,
			     const CMatrixWithEigenVectors& inMatrix);

};


ostream& operator<<(ostream& outStream,
		    const CMatrixWithEigenVectors& inMatrix);
#endif

Documentation generated by muellerw@pc7170 on Fre Sep 29 14:43:08 CEST 2000