FactorGraphDataGenerator.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) 2015 Jiaolong Xu
 * Copyright (C) 2015 Jiaolong Xu
 */

#ifndef __FACTOR_GRAPH_DATA_GENERATOR_H__
#define __FACTOR_GRAPH_DATA_GENERATOR_H__

#include <shogun/mathematics/Math.h>
#include <shogun/lib/SGVector.h>
#include <shogun/lib/SGNDArray.h>
#include <shogun/lib/SGMatrix.h>
#include <shogun/base/DynArray.h>
#include <shogun/base/init.h>
#include <shogun/io/SGIO.h>

#include <shogun/structure/FactorGraph.h>
#include <shogun/structure/FactorGraphModel.h>
#include <shogun/structure/FactorType.h>
#include <shogun/structure/Factor.h>

#include <shogun/structure/MAPInference.h>
#include <shogun/structure/StochasticSOSVM.h>

#include <shogun/features/FactorGraphFeatures.h>
#include <shogun/labels/FactorGraphLabels.h>

namespace shogun
{
class CFactorGraphDataGenerator: public CSGObject
{
public:
    CFactorGraphDataGenerator();

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

    CFactorGraph* simple_chain_graph();

    int32_t grid_to_index(int32_t x, int32_t y, int32_t w = 10);

    void truncate_energy(float64_t &A, float64_t &B, float64_t &C, float64_t &D);

    CFactorGraph* random_chain_graph(SGVector<int> &assignment_expect, float64_t &min_energy_expect, int32_t N = 2);

    CFactorGraph* multi_state_tree_graph();

    void generate_data(int32_t len_label, int32_t len_feat, int32_t size_data,
                       SGMatrix<float64_t> &feats, SGMatrix<int32_t> &labels);

    SGMatrix< int32_t > get_edges_full(const int32_t num_classes);

    void build_factor_graph(SGMatrix<float64_t> feats, SGMatrix<int32_t> labels,
                            SGMatrix< int32_t > edge_list, const DynArray<CTableFactorType*> &v_factor_type,
                            CFactorGraphFeatures* fg_feats, CFactorGraphLabels* fg_labels);

    void define_factor_types(int32_t num_classes, int32_t dim, int32_t num_edges,
                             DynArray<CTableFactorType*> &v_factor_type);

    float64_t test_sosvm(EMAPInferType infer_type);
};
}
#endif