FeatureSelector.h

#ifndef _theplu_yat_classifier_featureselector_
#define _theplu_yat_classifier_featureselector_

// $Id: FeatureSelector.h 4207 2022-08-26 04:36:28Z peter $

/*
  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson
  Copyright (C) 2022 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 3 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 yat. If not, see <http://www.gnu.org/licenses/>.
*/

#include "yat/utility/Index.h"

#include <list>

namespace theplu {
namespace yat {
namespace classifier {
  class MatrixLookup;
  class MatrixLookupWeighted;
  class Target;

  class FeatureSelector
  {
  public:
    FeatureSelector(size_t N, size_t skip=0);

    virtual ~FeatureSelector(void);

    const MatrixLookup get(const MatrixLookup& data);

    const MatrixLookupWeighted get(const MatrixLookupWeighted& data);

    const utility::Index features(void) const;

    virtual void update(const MatrixLookup& matrix, const Target& target)=0;

    virtual void update(const MatrixLookupWeighted& matrix,
                        const Target& target)=0;

  protected:
    utility::Index features_;

    size_t first_;

    size_t N_;

  private:

  };

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

#endif