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

#ifndef _CPRUNE_VAR_SUB_MEAN__H__
#define _CPRUNE_VAR_SUB_MEAN__H__

#include <shogun/preprocessor/DensePreprocessor.h>
#include <shogun/features/Features.h>
#include <shogun/lib/common.h>

#include <stdio.h>

namespace shogun
{
class CPruneVarSubMean : public CDensePreprocessor<float64_t>
{
    public:
        CPruneVarSubMean(bool divide=true);

        virtual ~CPruneVarSubMean();

        virtual bool init(CFeatures* features);

        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);

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

        virtual EPreprocessorType get_type() const { return P_PRUNEVARSUBMEAN; }

    private:
        void init();
        void register_parameters();

    protected:
        SGVector<int32_t> m_idx;
        SGVector<float64_t> m_mean;
        SGVector<float64_t> m_std;
        int32_t m_num_idx;
        bool m_divide_by_std;

        bool m_initialized;
};
}
#endif