MulticlassLabels.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) 1999-2009 Soeren Sonnenburg
 * Written (W) 1999-2008 Gunnar Raetsch
 * Written (W) 2011 Heiko Strathmann
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _MULTICLASS_LABELS__H__
#define _MULTICLASS_LABELS__H__

#include <shogun/lib/config.h>

#include <shogun/lib/common.h>
#include <shogun/io/File.h>
#include <shogun/labels/LabelTypes.h>
#include <shogun/labels/DenseLabels.h>
#include <shogun/features/SubsetStack.h>
#include <shogun/lib/SGMatrix.h>

namespace shogun
{
    class CFile;
    class CBinaryLabels;
    class CMulticlassLabels;
    class CDenseLabels;

class CMulticlassLabels : public CDenseLabels
{
    public:
        CMulticlassLabels();

        CMulticlassLabels(int32_t num_labels);

        CMulticlassLabels(SGVector<float64_t> src);

        CMulticlassLabels(CFile* loader);

        ~CMulticlassLabels();

        virtual void ensure_valid(const char* context=NULL);

        virtual ELabelType get_label_type() const;

        CBinaryLabels* get_binary_for_class(int32_t i);

        SGVector<float64_t> get_unique_labels();

        int32_t get_num_classes();

        SGVector<float64_t> get_multiclass_confidences(int32_t i);

        void set_multiclass_confidences(int32_t i, SGVector<float64_t> confidences);

        void allocate_confidences_for(int32_t n_classes);

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

    private:
        void init();

    protected:

        SGMatrix<float64_t> m_multiclass_confidences;
};
}
#endif