DoubleQLearning.hpp

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#ifndef AI_TOOLBOX_MDP_DOUBLE_QLEARNING_HEADER_FILE
#define AI_TOOLBOX_MDP_DOUBLE_QLEARNING_HEADER_FILE
 
#include <stddef.h>
 
#include <AIToolbox/MDP/Types.hpp>
#include <AIToolbox/MDP/TypeTraits.hpp>
#include <AIToolbox/MDP/Utils.hpp>
 
namespace AIToolbox::MDP {
    class DoubleQLearning {
        public:
            DoubleQLearning(size_t S, size_t A, double discount = 1.0, double alpha = 0.1);
 
            template <IsGenerativeModel M>
            DoubleQLearning(const M& model, double alpha = 0.1);
 
            void setLearningRate(double a);
 
            double getLearningRate() const;
 
            void setDiscount(double d);
 
            double getDiscount() const;
 
            void stepUpdateQ(size_t s, size_t a, size_t s1, double rew);
 
            size_t getS() const;
 
            size_t getA() const;
 
            const QFunction & getQFunction() const;
 
            const QFunction & getQFunctionA() const;
 
            QFunction getQFunctionB() const;
 
            void setQFunction(const QFunction & qfun);
 
        private:
            size_t S, A;
            double alpha_;
            double discount_;
 
            mutable RandomEngine rand_;
            std::bernoulli_distribution dist_;
 
            // First QFunction and "sum" QFunction
            QFunction qa_, qc_;
    };
 
    template <IsGenerativeModel M>
    DoubleQLearning::DoubleQLearning(const M& model, const double alpha) :
            DoubleQLearning(model.getS(), model.getA(), model.getDiscount(), alpha) {}
}
 
#endif