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EvolutionStrategy.h

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// EvolutionStrategy.h: interface for the CEvolutionStrategy class.
//

#if !defined(AFX_EVOLUTIONSTRATEGY_H__CA201537_5E8F_44BF_8F51_87D452D0BB82__INCLUDED_)
#define AFX_EVOLUTIONSTRATEGY_H__CA201537_5E8F_44BF_8F51_87D452D0BB82__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

//#ifndef _WIN32
//using namespace std;
//#endif

#include "Minimizer.h"
#include "Rand.h"
#include "typedefs.h"
#include "ParameterFilter.h"
#include "EvolutionStrategyChromosome.h"
using namespace std;

class CEvolutionStrategy : public Minimizer 
{
public:
        CEvolutionStrategy(CParameterFilter *pFilter);
        CEvolutionStrategy(CParameterFilter *pFilter, int mu, int rho, int lambda, int nGenerations, int seed);
        virtual ~CEvolutionStrategy();
        // allocates memory and sets algorithm-specific parameters
        virtual void InitializePopulation(double *parameters) = 0;
        // performs the minimization
        double Minimize(double *parameters, Minimizable *minimizable);
        // selects rho parents from the population to form one offspring
        virtual void SelectParents() = 0;
        // mutates object and strategy parameters for one offspring
        virtual void Mutation(int whichOffspring) = 0;
        // recombines object and strategy parameters for one offspring
        virtual void Recombination(int whichOffspring) = 0;
        // performs selection on the offspring to form a new population
        virtual void Select() = 0;
        // evaluates the cost for one offspring
        double EvaluateOffspring(Minimizable *minimizable, int whichOffspring);
protected:
        std::vector<CEvolutionStrategyChromosome *> m_vpPopulation;
        std::vector<CEvolutionStrategyChromosome *> m_vpOffspring;
        // size of population
        int m_iMu;
        // number of parents involved in production of one offspring
        int m_iRho;
        // size of offspring pool subject to selection
        int m_iLambda;
        // number of strategy parameters
        int m_iNStrategyParameters;
        // number of generations over which to run the algorithm
        int m_iNGenerations;
        // random number generator
        Rand *m_pRNG;
        // filter for parameters
        CParameterFilter *m_pFilter;
        // cost statistics
        double m_dAvgCost;
        // list of parent indices for offspring production
        intVector m_viParents;
};

#endif // !defined(AFX_EVOLUTIONSTRATEGY_H__CA201537_5E8F_44BF_8F51_87D452D0BB82__INCLUDED_)

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