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MulticlassOneVsRestStrategy.h
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MulticlassOneVsRestStrategy.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) 2012 Chiyuan Zhang
* Copyright (C) 2012 Chiyuan Zhang
*/
#ifndef MULTICLASSONEVSRESTSTRATEGY_H__
#define MULTICLASSONEVSRESTSTRATEGY_H__
#include <shogun/multiclass/MulticlassStrategy.h>
namespace shogun
{
class CMulticlassOneVsRestStrategy: public CMulticlassStrategy
{
public:
/** constructor */
CMulticlassOneVsRestStrategy();
/** constructor with rejection strategy */
CMulticlassOneVsRestStrategy(CRejectionStrategy *rejection_strategy);
/** destructor */
virtual ~CMulticlassOneVsRestStrategy() {}
/** get rejection strategy */
CRejectionStrategy *get_rejection_strategy()
{
SG_REF(m_rejection_strategy);
return m_rejection_strategy;
}
/** set rejection strategy */
void set_rejection_strategy(CRejectionStrategy *rejection_strategy)
{
SG_REF(rejection_strategy);
SG_UNREF(m_rejection_strategy);
m_rejection_strategy = rejection_strategy;
}
/** start training */
virtual void train_start(CLabels *orig_labels, CLabels *train_labels)
{
CMulticlassStrategy::train_start(orig_labels, train_labels);
}
/** has more training phase */
virtual bool train_has_more()
{
return m_train_iter < m_num_classes;
}
/** prepare for the next training phase.
* @return NULL, since no subset is needed in one-vs-rest strategy
*/
virtual SGVector<int32_t> train_prepare_next();
/** decide the final label.
* @param outputs a vector of output from each machine (in that order)
*/
virtual int32_t decide_label(const SGVector<float64_t> &outputs);
/** get number of machines used in this strategy.
*/
virtual int32_t get_num_machines()
{
return m_num_classes;
}
/** get name */
virtual const char* get_name() const
{
return "MulticlassOneVsRestStrategy";
};
protected:
CRejectionStrategy *m_rejection_strategy;
};
} // namespace shogun
#endif /* end of include guard: MULTICLASSONEVSRESTSTRATEGY_H__ */