TwoStateModel.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2012 Fernando José Iglesias García
 * Copyright (C) 2012 Fernando José Iglesias García
 */

#ifndef __TWO_STATE_MODEL_H__
#define __TWO_STATE_MODEL_H__

#include <shogun/lib/config.h>

#include <shogun/structure/StateModel.h>
#include <shogun/structure/HMSVMModel.h>

namespace shogun
{

class CTwoStateModel : public CStateModel
{
    public:
        CTwoStateModel();

        virtual ~CTwoStateModel();

        virtual SGMatrix< float64_t > loss_matrix(CSequence* label_seq);

        virtual float64_t loss(CSequence* label_seq_lhs, CSequence* label_seq_rhs);

        virtual void reshape_emission_params(SGVector< float64_t >& emission_weights,
                SGVector< float64_t > w, int32_t num_feats, int32_t num_obs);

        virtual void reshape_emission_params(CDynamicObjectArray* plif_matrix,
            SGVector< float64_t > w, int32_t num_feats, int32_t num_plif_nodes);

        virtual void reshape_transmission_params(
                SGMatrix< float64_t >& transmission_weights,
                SGVector< float64_t > w);

        virtual SGVector< int32_t > labels_to_states(CSequence* label_seq) const;

        virtual CSequence* states_to_labels(SGVector< int32_t > state_seq) const;

        virtual void weights_to_vector(SGVector< float64_t >& psi,
                SGMatrix< float64_t > transmission_weights,
                SGVector< float64_t > emission_weights,
                int32_t num_feats, int32_t num_obs) const;

        virtual SGVector< float64_t > weights_to_vector(SGMatrix< float64_t > transmission_weights,
                SGVector< float64_t > emission_weights, int32_t num_feats, int32_t num_obs) const;

        virtual SGVector< int32_t > get_monotonicity(int32_t num_free_states,
                int32_t num_feats) const;

        static CHMSVMModel* simulate_data(int32_t num_exm, int32_t exm_len, int32_t num_features, int32_t num_noise_features);

        virtual const char* get_name() const { return "TwoStateModel"; }
};

} /* namespace shogun */

#endif /* __TWO_STATE_MODEL_H__ */