NearestCentroid.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 Philippe Tillet
 */

#ifndef _NEAREST_CENTROID_H__
#define _NEAREST_CENTROID_H__

#include <stdio.h>
#include <shogun/lib/common.h>
#include <shogun/io/SGIO.h>
#include <shogun/features/Features.h>
#include <shogun/features/DenseFeatures.h>
#include <shogun/distance/Distance.h>
#include <shogun/machine/DistanceMachine.h>

namespace shogun
{

class CDistanceMachine;

class CNearestCentroid : public CDistanceMachine{
    
public:

    MACHINE_PROBLEM_TYPE(PT_MULTICLASS);

    CNearestCentroid();
    
    CNearestCentroid(CDistance* distance, CLabels* trainlab);
    
    virtual ~CNearestCentroid();
    
    void set_shrinking(float64_t shrinking) {
        m_shrinking = shrinking ;
    }
    
    float64_t get_shrinking() const{
        return m_shrinking;
    }

    CDenseFeatures<float64_t>* get_centroids() const{
        return m_centroids;
    }

    virtual const char* get_name() const { return "NearestCentroid"; }
    
protected:
    virtual bool train_machine(CFeatures* data=NULL);
    
private:
    void init();
    
protected:
    int32_t m_num_classes;
    
    float64_t m_shrinking;
    
    CDenseFeatures<float64_t>* m_centroids;
    
    bool m_is_trained;
};

}

#endif