DimensionReductionPreprocessor.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) 2011 Sergey Lisitsyn
 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
 */

#ifndef DIMENSIONREDUCTIONPREPROCESSOR_H_
#define DIMENSIONREDUCTIONPREPROCESSOR_H_

#include <shogun/preprocessor/SimplePreprocessor.h>
#include <shogun/features/Features.h>
#include <shogun/distance/Distance.h>

namespace shogun
{

class CFeatures;

class CDimensionReductionPreprocessor: public CSimplePreprocessor<float64_t>
{
public:

    /* constructor */
    CDimensionReductionPreprocessor() : CSimplePreprocessor<float64_t>()
    {
        m_target_dim = 1;

        init();
    };

    /* destructor */
    virtual ~CDimensionReductionPreprocessor() {};

    virtual bool init(CFeatures* data)
    {
        return true;
    };

    virtual void cleanup()
    {

    };

    virtual SGMatrix<float64_t> apply_to_feature_matrix(CFeatures* features)
    {
        return ((CSimpleFeatures<float64_t>*)features)->get_feature_matrix();
    };

    virtual SGVector<float64_t> apply_to_feature_vector(SGVector<float64_t> vector)
    {
        return vector;
    };

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

    virtual inline EPreprocessorType get_type() const { return P_DIMENSIONREDUCTIONPREPROCESSOR; };

    void inline set_target_dim(int32_t dim)
    {
        ASSERT(dim>0);
        m_target_dim = dim;
    }

    int32_t inline get_target_dim()
    {
        return m_target_dim;
    }

public:

    static const int32_t AUTO_TARGET_DIM = -1;

protected:

    void init()
    {
        m_parameters->add(&m_target_dim, "target_dim",
                          "target dimensionality of preprocessor");
    }

protected:

    int32_t m_target_dim;

};
}

#endif /* DIMENSIONREDUCTIONPREPROCESSOR_H_ */