Perceptron.h

#ifndef theplu_yat_classifier_perceptron
#define theplu_yat_classifier_perceptron

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

/*
  Copyright (C) 2017, 2021, 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/Matrix.h>
#include <yat/utility/Vector.h>

namespace theplu {
namespace yat {
namespace classifier {

  class Target;

  class Perceptron
  {
  public:
    const utility::Matrix& covariance(void) const;

    double oddsratio(size_t i) const;

    double oddsratio_lower_CI(size_t i, double alpha=0.05) const;

    double oddsratio_upper_CI(size_t i, double alpha=0.05) const;

    double p_value(size_t i) const;

    double predict(const utility::VectorBase& x) const;

    void train(const utility::MatrixBase& x, const Target& target);

    const utility::Vector& weight(void) const;
  private:
    utility::Vector weight_;
    utility::Matrix covariance_;
    double margin(size_t i, double alpha) const;
    // using compiler generated copy
    //Perceptron(const Perceptron&)
    //Perceptron& operator=(const Perceptron&)
  };


}}}// end of namespace classifier, yat, and theplu
#endif