source: trunk/yat/normalization/ColumnNormalizer.h @ 1462

#ifndef _theplu_yat_normalization_column_normalizer_
#define _theplu_yat_normalization_column_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 Normalize each column

     Using a functor T to normalize each column.

     \since New in yat 0.5
   */
  template<class T>
  class ColumnNormalizer
  {
  public:
    /**
       functor used to normalize each column
    */
    typedef T normalizer_type

    /**
       \brief Default constructor
     */
    ColumnNormalizer(void) {}

    /**
       \brief Constructor taking a functor \a norm
     */
    ColumnNormalizer(T norm) 
      : normalizer_(norm) {}

    /**
       Each column in \a result is normalized using class T.

       \note matrix is ignored
     */
    void operator()(const utility::Matrix& matrix, 
                    utility::Matrix& result) const;
  private:
    T normalizer_;
  };

  template<class T>
  void ColumnNormalizer<T>::operator()(const utility::Matrix& matrix, 
                                       utility::Matrix& result) const
  {
    for (size_t i=0; i<matrix.rows(); ++i)
      normalizer_(result.begin_const_column(i), result.end_const_columns(i),
                  result.begin_column(i));

  }


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