197 lines
4.3 KiB
C++
197 lines
4.3 KiB
C++
/*
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* Open BEAGLE
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* Copyright (C) 2001-2007 by Christian Gagne and Marc Parizeau
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Contact:
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* Laboratoire de Vision et Systemes Numeriques
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* Departement de genie electrique et de genie informatique
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* Universite Laval, Quebec, Canada, G1K 7P4
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* http://vision.gel.ulaval.ca
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*
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*/
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/*!
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* \file Functions.hpp
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* \brief Definition of the differents functions that can be optimized.
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* \author Christian Gagne
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* $Revision: 1.5.2.1 $
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* $Date: 2007/05/11 19:13:09 $
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*/
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#ifndef Functions_hpp
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#define Functions_hpp
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#include <cmath>
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#include <vector>
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/*!
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* \brief Sphere function (F1).
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*/
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class SphereFunct {
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public:
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/*!
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* \brief Construct a Sphere function object.
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*/
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SphereFunct() { }
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/*!
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* \brief Evaluate the function on a given point.
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* \param inX Point to evaluate the function value.
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* \return Value of function at the given point.
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*/
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inline double operator()(const std::vector<double>& inX) const
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{
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double lSum=0.0;
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// for(unsigned i=0; i<inX.size(); ++i) {
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// lSum += (inX[i] * inX[i]);
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// }
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for(unsigned i=0; i<inX.size(); ++i) {
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const double lXtrans = inX[i] - double(i)*3.;
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lSum += (lXtrans * lXtrans);
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}
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return lSum;
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}
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};
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/*!
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* \brief Schwefel's function (F2).
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*/
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class SchwefelFunct {
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public:
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/*!
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* \brief Construct a Schwefel's function object.
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*/
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SchwefelFunct() { }
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/*!
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* \brief Evaluate the function on a given point.
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* \param inX Point to evaluate the function value.
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* \return Value of function at the given point.
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*/
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inline double operator()(const std::vector<double>& inX) const
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{
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double lSum1=0.0, lSum2=0.0;
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for(unsigned i=0; i<inX.size(); ++i) {
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lSum2=0.0;
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for(unsigned int j=0; j<=i; ++j) {
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lSum2 += inX[j];
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}
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lSum1 += (lSum2 * lSum2);
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}
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return lSum1;
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}
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};
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/*!
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* \brief F3 function.
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*/
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class F3Funct {
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public:
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/*!
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* \brief Construct a F3 function object.
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*/
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F3Funct() { }
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/*!
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* \brief Evaluate the function on a given point.
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* \param inX Point to evaluate the function value.
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* \return Value of function at the given point.
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*/
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inline double operator()(const std::vector<double>& inX) const
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{
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double lSum=0.0;
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for(unsigned i=0; i<inX.size(); ++i) {
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lSum += (inX[i] * inX[i] * std::pow(1.0e6, double(i)/(double(inX.size())-1.0)));
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}
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return lSum;
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}
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};
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/*!
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* \brief Rosenbrock's function (F6).
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*/
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class RosenbrockFunct {
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public:
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/*!
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* \brief Construct a Rosenbrock's function object.
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*/
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RosenbrockFunct() { }
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/*!
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* \brief Evaluate the function on a given point.
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* \param inX Point to evaluate the function value.
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* \return Value of function at the given point.
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*/
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inline double operator()(const std::vector<double>& inX) const
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{
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double lSum=0.0;
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for(unsigned int i=0; i<(inX.size()-1); ++i) {
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lSum += (100.0 * std::pow(((inX[i]*inX[i])-inX[i+1]), 2.0)) +
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std::pow(inX[i], 2.0);
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}
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return lSum;
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}
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};
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/*!
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* \brief Rastrigin's function (F9).
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*/
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class RastriginFunct {
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public:
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/*!
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* \brief Construct a Rastrigin's function object.
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*/
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RastriginFunct() { }
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/*!
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* \brief Evaluate the function on a given point.
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* \param inX Point to evaluate the function value.
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* \return Value of function at the given point.
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*/
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inline double operator()(const std::vector<double>& inX) const
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{
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double lSum=0.0;
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for(unsigned i=0; i<inX.size(); ++i) {
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lSum += (inX[i] * inX[i]) - (10.0 * std::cos(2.0*M_PI*inX[i])) + 10.0;
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}
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return lSum;
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}
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};
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#endif // Functions_hpp
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