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/lib/config.h>

#include <shogun/preprocessor/DensePreprocessor.h>
#include <shogun/converter/EmbeddingConverter.h>
#include <shogun/features/Features.h>
#include <shogun/distance/Distance.h>

namespace shogun
{

class CFeatures;
class CDistance;
class CKernel;

class CDimensionReductionPreprocessor: public CDensePreprocessor<float64_t>
{
public:

    CDimensionReductionPreprocessor();

    CDimensionReductionPreprocessor(CEmbeddingConverter* converter);

    virtual ~CDimensionReductionPreprocessor();

    virtual bool init(CFeatures* data);

    virtual void cleanup();

    virtual SGMatrix<float64_t> apply_to_feature_matrix(CFeatures* features);

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

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

    virtual EPreprocessorType get_type() const;

    void set_target_dim(int32_t dim);

    int32_t get_target_dim() const;

    void set_distance(CDistance* distance);

    CDistance* get_distance() const;

    void set_kernel(CKernel* kernel);

    CKernel* get_kernel() const;

private:

    void initialize_parameters();

protected:

    int32_t m_target_dim;

    CDistance* m_distance;

    CKernel* m_kernel;

    CEmbeddingConverter* m_converter;
};
}

#endif /* DIMENSIONREDUCTIONPREPROCESSOR_H_ */