Polynomial.h

#ifndef _theplu_yat_regression_polynomial_
#define _theplu_yat_regression_polynomial_

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

/*
  Copyright (C) 2005, 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 "OneDimensional.h"
#include "MultiDimensional.h"

namespace theplu {
namespace yat {
namespace utility {
  class VectorBase;
}
namespace regression {

  class Polynomial : public OneDimensional
  {
  public:

    explicit Polynomial(size_t power);

    ~Polynomial(void);

    const utility::Matrix& covariance(void) const;

    void fit(const utility::VectorBase& x, const utility::VectorBase& y);

    const utility::Vector& fit_parameters(void) const;

    double predict(const double x) const;

    double s2(void) const;

    double standard_error2(const double x) const;

  private:
    MultiDimensional md_;
    size_t power_;

  };

}}} // of namespaces regression, yat, and theplu

#endif