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MPDSVM.h
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MPDSVM.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) 1999-2009 Soeren Sonnenburg
* Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
*/
#ifndef _MPDSVM_H___
#define _MPDSVM_H___
#include <shogun/lib/config.h>
#include <shogun/lib/common.h>
#include <shogun/classifier/svm/SVM.h>
#include <shogun/lib/Cache.h>
#include <shogun/labels/BinaryLabels.h>
namespace shogun
{
/** @brief class MPDSVM */
class CMPDSVM : public CSVM
{
public:
/** default constructor */
CMPDSVM();
/** constructor
*
* @param C constant C
* @param k kernel
* @param lab labels
*/
CMPDSVM(float64_t C, CKernel* k, CLabels* lab);
virtual ~CMPDSVM();
/** get classifier type
*
* @return classifier type MPD
*/
virtual EMachineType get_classifier_type() { return CT_MPD; }
/** @return object name */
virtual const char* get_name() const { return "MPDSVM"; }
protected:
/** train SVM classifier
*
* @param data training data (parameter can be avoided if distance or
* kernel-based classifiers are used and distance/kernels are
* initialized with train data)
*
* @return whether training was successful
*/
virtual bool train_machine(CFeatures* data=NULL);
/** compute H
*
* @param i index of H
* @param j index of H
* @return computed H at index i,j
*/
inline float64_t compute_H(int32_t i, int32_t j)
{
return ((CBinaryLabels*) m_labels)->get_label(i)*
((CBinaryLabels*) m_labels)->get_label(j)*kernel->kernel(i,j);
}
/** lock kernel row
*
* @param i row to lock
* @return locked row
*/
inline KERNELCACHE_ELEM* lock_kernel_row(int32_t i)
{
KERNELCACHE_ELEM* line=NULL;
if (kernel_cache->is_cached(i))
{
line=kernel_cache->lock_entry(i);
ASSERT(line)
}
if (!line)
{
line=kernel_cache->set_entry(i);
ASSERT(line)
for (int32_t j=0; j<m_labels->get_num_labels(); j++)
line[j]=(KERNELCACHE_ELEM) ((CBinaryLabels*) m_labels)->get_label(i)*((CBinaryLabels*) m_labels)->get_label(j)*kernel->kernel(i,j);
}
return line;
}
/** unlock kernel row
*
* @param i row to unlock
*/
inline void unlock_kernel_row(int32_t i)
{
kernel_cache->unlock_entry(i);
}
/** kernel cache */
CCache<KERNELCACHE_ELEM>* kernel_cache;
};
}
#endif /* _MPDSVM_H___ */