source: trunk/yat/normalization/QuantileNormalizer.h @ 1469

#ifndef _theplu_yat_normalization_quantile_normalizer_
#define _theplu_yat_normalization_quantile_normalizer_

/*
  Copyright (C) 2008 Peter Johansson

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

namespace theplu {
namespace yat {
namespace utility {
  class Matrix;
}
namespace normalization {

  /**
     \brief Perform quantile normalization

     \since New in yat 0.5
   */
  class QuantileNormalizer
  {
  public:
    /**
       The \a matrix is normalized by sorting each column, replacing
       each value with the average across rows, and undo the sorting
       in step 1. This results in a \a matrix in which each column has
       the same distribution of data, and the rank of an element
       within a column is preserved in the normalization.

       \note Number of rows in \a matrix and \a result must match.
     */
    void operator()(const utility::Matrix& matrix, 
                    utility::Matrix& result) const;
  };

}}} // end of namespace normalization, yat and thep
#endif