source: trunk/yat/statistics/PearsonDistance.h @ 683

#ifndef _theplu_yat_statistics_pearsondistance_
#define _theplu_yat_statistics_pearsondistance_

// $Id: PearsonDistance.h 683 2006-10-11 22:20:36Z jari $

/*
  Copyright (C) The authors contributing to this file.

  This file is part of the yat library, http://lev.thep.lu.se/trac/yat

  The yat library 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.

  The yat library 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.
*/

#include "Distance.h"

namespace theplu{
namespace yat{
  
  namespace utility {
    class vector;
  }

  namespace classifier {
    class DataLookup1D;
  }

namespace statistics{
  ///
  /// Class for calculating distances using Pearson correlation.
  /// d=1-C.
  ///
  class PearsonDistance : public Distance
  {
  public:

    PearsonDistance()
      : Distance()
    {
    }

    virtual ~PearsonDistance()
    {
    }   
    
    // Use all operator() from Distance except the ones that are
    // overloaded in this class.
    using Distance::operator();

    virtual double operator()(const utility::vector& x, 
                              const utility::vector& y) const;


    virtual double operator()(const utility::vector& x, 
                              const utility::vector& y, 
                              const utility::vector& wx, 
                              const utility::vector& wy) const;

  private:
  };

}}} // of namespace statistics, yat, and theplu

#endif