source: branches/0.4-stable/yat/classifier/BootstrapSampler.h @ 1392

#ifndef _theplu_yat_classifier_bootstrap_sampler_ 
#define _theplu_yat_classifier_bootstrap_sampler_

// $Id: BootstrapSampler.h 1392 2008-07-28 19:35:30Z peter $

/*
  Copyright (C) 2007 Jari Häkkinen, 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.
*/

#include "Sampler.h"

namespace theplu {
namespace yat {
namespace classifier {

  class Target;

  /**
     @brief Class creating trainingset and validationset using bootstrapping. 

     This is done in a balanced way, meaning the proportions between
     the classes in the trainingset is equal to the proportions in the
     whole dataset. For each class \f$ N_i \f$ samples are drawn with
     replacement, where \f$ N_i \f$ is number of samples in class i. 
  */
  class BootstrapSampler : public Sampler
  {

  public:
    ///
    /// @brief Constructor 
    ///
    /// @a target targets.    
    /// @a N total number of partitions.
    ///
    BootstrapSampler(const Target& target, const size_t N);

    ///
    /// Destructor
    ///
    virtual ~BootstrapSampler();

  private:
    void build(const Target& target, size_t N); 

  };

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

#endif