GeneticMinimizer.h

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// @(#)root/mathcore:$Id
 
/**********************************************************************
 *                                                                    *
 * Copyright (c) 2006  LCG ROOT Math Team, CERN/PH-SFT                *
 *                                                                    *
 *                                                                    *
 **********************************************************************/
 
// Header file for class GeneticMinimizer
 
#ifndef ROOT_Math_GeneticMinimizer
#define ROOT_Math_GeneticMinimizer
 
#include "Math/Minimizer.h"
 
#include "RtypesCore.h"
 
#include <vector>
#include <string>
 
namespace TMVA {
   class IFitterTarget;
   class Interval;
}
 
namespace ROOT {
   namespace Math {
 
 
//_______________________________________________________________________________
/*
  structure containing the parameters of the genetic minimizer
 */
struct GeneticMinimizerParameters {
 
   Int_t fPopSize;
   Int_t fNsteps;
   Int_t fCycles;
   Int_t fSC_steps;
   Int_t fSC_rate;
   Double_t fSC_factor;
   Double_t fConvCrit;
   Int_t fSeed;
 
 
   // constructor with default value
   GeneticMinimizerParameters();
};
 
 
 
//_______________________________________________________________________________
/**
   GeneticMinimizer
 
   Minimizer class based on the Gentic algorithm implemented in TMVA
 
   @ingroup MultiMin
*/
class GeneticMinimizer: public ROOT::Math::Minimizer {
 
public:
 
   //GeneticMinimizer (int = 0);
   GeneticMinimizer (int i = 0);
   virtual ~GeneticMinimizer ();
 
   virtual void Clear();
   using ROOT::Math::Minimizer::SetFunction;
   virtual void SetFunction(const ROOT::Math::IMultiGenFunction & func);
 
   virtual bool SetLimitedVariable(unsigned int , const std::string& , double , double , double, double);
   virtual bool SetVariable(unsigned int ivar, const std::string & name, double val, double step);
   virtual bool SetFixedVariable(unsigned int ivar  , const std::string & name , double val);
 
   virtual  bool Minimize();
   virtual double MinValue() const;
   virtual double Edm() const;
   virtual const double *  X() const;
   virtual const double *  MinGradient() const;
   virtual unsigned int NCalls() const;
 
   virtual unsigned int NDim() const;
   virtual unsigned int NFree() const;
 
   virtual bool ProvidesError() const;
   virtual const double * Errors() const;
 
   virtual double CovMatrix(unsigned int i, unsigned int j) const;
 
   void SetParameters(const GeneticMinimizerParameters & params );
 
   void SetRandomSeed(int seed) { fParameters.fSeed = seed; }
 
   const GeneticMinimizerParameters & MinimizerParameters() const { return fParameters; }
 
   virtual ROOT::Math::MinimizerOptions Options() const;
 
   virtual void SetOptions(const ROOT::Math::MinimizerOptions & opt);
 
protected:
 
   void GetGeneticOptions(ROOT::Math::MinimizerOptions & opt) const;
 
   std::vector<TMVA::Interval*> fRanges;
   TMVA::IFitterTarget* fFitness;
   double fMinValue;
   std::vector<double> fResult;
 
   GeneticMinimizerParameters fParameters;
 
};
 
 
   } // end namespace Math
} // end namespace ROOT
 
#endif /* ROOT_Math_GeneticMinimizer */