RandomCARTree.h

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/*
 * Copyright (c) The Shogun Machine Learning Toolbox
 * Written (w) 2014 Parijat Mazumdar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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 */


#ifndef _RANDOMCARTREE_H__
#define _RANDOMCARTREE_H__

#include <shogun/lib/config.h>

#include <shogun/multiclass/tree/TreeMachine.h>
#include <shogun/multiclass/tree/CARTree.h>

namespace shogun
{

class CRandomCARTree : public CCARTree
{
public:
    CRandomCARTree();

    virtual ~CRandomCARTree();

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

    void set_feature_subset_size(int32_t size);

    int32_t get_feature_subset_size() const { return m_randsubset_size; }

protected:
    virtual int32_t compute_best_attribute(const SGMatrix<float64_t>& mat, const SGVector<float64_t>& weights, CLabels* labels,
        SGVector<float64_t>& left, SGVector<float64_t>& right, SGVector<bool>& is_left_final, int32_t &num_missing,
        int32_t &count_left, int32_t &count_right, int32_t subset_size=0, const SGVector<int32_t>& active_indices=SGVector<index_t>());

private:
    void init();

private:
    int32_t m_randsubset_size;

};
} /* namespace shogun */

#endif /* _RANDOMCARTREE_H__ */