CustomMahalanobisDistance.h

Go to the documentation of this file.

/*
 * 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) 2013 Fernando J. Iglesias Garcia
 * Copyright (C) 2013 Fernando J. Iglesias Garcia
 */

#ifndef CUSTOM_MAHALANOBIS_DISTANCE_
#define CUSTOM_MAHALANOBIS_DISTANCE_

#ifdef HAVE_EIGEN3

#include <shogun/distance/RealDistance.h>
#include <shogun/features/DenseFeatures.h>
#include <shogun/lib/SGMatrix.h>

namespace shogun
{

class CCustomMahalanobisDistance : public CRealDistance
{
    public:
        CCustomMahalanobisDistance();

        CCustomMahalanobisDistance(CFeatures* l, CFeatures* r, SGMatrix<float64_t> m);

        virtual ~CCustomMahalanobisDistance();

        virtual void cleanup();

        virtual const char* get_name() const;

        virtual EDistanceType get_distance_type();

    protected:
        virtual float64_t compute(int32_t idx_a, int32_t idx_b);

    private:
        void init();

    private:
        SGMatrix<float64_t> m_mahalanobis_matrix;

}; /* class CCustomMahalanobisDistance */

} /* namespace shogun */

#endif /* HAVE_EIGEN3 */

#endif /* CUSTOM_MAHALANOBIS_DISTANCE_ */