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

// $Id: PearsonDistance.cc 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 "PearsonDistance.h"
#include "AveragerPair.h"
#include "AveragerPairWeighted.h"
#include "yat/utility/vector.h"

namespace theplu{
namespace yat{
namespace statistics{

  double PearsonDistance::operator()(const utility::vector& x, 
                                     const utility::vector& y) const
  {
    AveragerPair ap;
    ap.add_values(x,y);
    return 1-ap.correlation();
  }

  double PearsonDistance::operator()(const utility::vector& x, 
                                     const utility::vector& y, 
                                     const utility::vector& wx, 
                                     const utility::vector& wy) const
  {
    AveragerPairWeighted ap;
    ap.add_values(x,y,wx, wy);
    return 1-ap.correlation();    
  }

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