TestFunctions.hpp

// Unfit: Data fitting and optimization software
//
// Copyright (C) 2012- Dr Martin Buist & Dr Alberto Corrias
// Contacts: martin.buist _at_ nus.edu.sg; alberto _at_ nus.edu.sg
//
// See the 'Contributors' file for a list of those who have contributed
// to this work.
//
// This program 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.
//
// This program 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, see <http://www.gnu.org/licenses/>.
//
#ifndef UNFIT_UNITTESTS_TESTFUNCTIONS_HPP_
#define UNFIT_UNITTESTS_TESTFUNCTIONS_HPP_

#include <limits>
#include <vector>
#include "GenericCostFunction.hpp"

namespace Unfit
{
namespace UnitTests
{
class SimpleCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    return residuals;
  }
};

class FirstNanCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    residuals[0] = std::numeric_limits<double>::signaling_NaN();
    return residuals;
  }
};

class LastNanCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    residuals.back() = std::numeric_limits<double>::signaling_NaN();
    return residuals;
  }
};

class FirstInfCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    residuals[0] = std::numeric_limits<double>::infinity();
    return residuals;
  }
};

class LastInfCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    residuals.back() = std::numeric_limits<double>::infinity();
    return residuals;
  }
};

class TableTopCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    for (auto &residual : residuals) {
      if (residual >= 0.0 && residual <= 1.0) {
        residual = 1.0;
      }
      else {
        residual = std::numeric_limits<double>::infinity();
      }
    }
    return residuals;
  }
};

class ReverseTableTopCostFunction : public GenericCostFunction
{
 public:
  std::vector<double> operator()(const std::vector<double> &x)
  {
    auto residuals = x;
    residuals.pop_back();
    for (auto &residual : residuals) {
      if (residual > 0.0 && residual < 1.0) {
        residual = std::numeric_limits<double>::infinity();
      }
      else {
        residual = 1.0;
      }
    }
    return residuals;
  }
};

}  // namespace Unittests
}  // namespace Unfit

#endif