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BaumWelch.hpp

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 * This file is part of openWNS (open Wireless Network Simulator)
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#ifndef CONSTANZE_BAUMWELCH_HPP
#define CONSTANZE_BAUMWELCH_HPP

#include <CONSTANZE/HMM.hpp>

namespace constanze
{

    // implementation with templete is possible
    //template baumWelchDataType
    //class BaumWelch<baumWelchDataType>
    class BaumWelch
        {
        public:
            BaumWelch();

                ~BaumWelch();

            HMM* baumWelch(HMM *initialHMM, std::vector<int> *observationVector,int iterations);

        HMM* getHMM();

    private:

        HMM *hmm;

                std::vector<std::vector<baumWelchDataType>*>*
                forward(HMM *initialHMM, std::vector<int> *observationVector);

                std::vector<std::vector<baumWelchDataType>*>*
                backward(HMM *initialHMM, std::vector<int> *observationVector);

        baumWelchDataType
        calculateGamma(int i, int t, std::vector<std::vector<baumWelchDataType>*> *forwardMatrix, std::vector<std::vector<baumWelchDataType>*> *backwardMatrix, HMM *h);

        baumWelchDataType
        calculateXi(int t,int i,int j,std::vector<int> *observationVector,std::vector<std::vector<baumWelchDataType>*> *forwardMatrix,std::vector<std::vector<baumWelchDataType>*> *backwardMatrix,HMM *h);

        baumWelchDataType
        divide(baumWelchDataType num,baumWelchDataType denom);

        };
}

#endif // NOT defined CONSTANZE_BAUMWELCH_HPP

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