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#ifndef _CONJUGATEMINIMIZER_H_
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#define _CONJUGATEMINIMIZER_H_
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#include "Minimizer.hpp"
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//abstract class of conjugate gradient minimizer
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class ConjugateMinimizerBase : public MinimizerUsingLineSearch{
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public:
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ConjugateMinimizerBase(NLModel1* nlmodel);
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~ConjugateMinimizerBase();
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bool isSolvable();
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virtual void Init();
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virtual void Minimize();
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virtual int checkConvergence();
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virtual void reset();
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virtual void printMinizerInfo();
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virtual void writeOut(vector<double>& x, double iter) {}
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protected:
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virtual double calcGamma(vector<double>& newGrad, vector<double>& oldGrad) = 0;
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NLModel0 * model;
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vector<double> prevGrad;
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vector<double> gradient;
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vector<double> prevDirection;
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vector<double> direction;
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};
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//Fletcher-Reeves Conjugate Gradient Method
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class FRCGMinimizer : public ConjugateMinimizerBase{
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protected:
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double calcGamma(vector<double>& newGrad, vector<double>& oldGrad);
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};
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//Polak-Reeves Conjugate Gradient Method
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class PRCGMinimizer : public ConjugateMinimizerBase{
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protected:
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double calcGamma(vector<double>& newGrad, vector<double>& oldGrad);
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};
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#endif
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