/usr/include/shogun/multiclass/ecoc/ECOCDiscriminantEncoder.h is in libshogun-dev 3.2.0-7.3build4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 ECOCDISCRIMINANTENCODER_H__
#define ECOCDISCRIMINANTENCODER_H__
#include <vector>
#include <set>
#include <shogun/multiclass/ecoc/ECOCEncoder.h>
#include <shogun/features/DenseFeatures.h>
#include <shogun/labels/Labels.h>
namespace shogun
{
/** Discriminant ECOC Encoder.
*
* A data-dependent ECOC coding scheme that learns a tree-style codebook. See the
* following paper for details
*
* Oriol Pujol, Petia Radeva, Jordi Vitria. Discriminant ECOC: A Heuristic Method for
* Application Dependent Design of Error Correcting Output Codes. TPAMI 2006.
*
*/
class CECOCDiscriminantEncoder: public CECOCEncoder
{
public:
/** constructor */
CECOCDiscriminantEncoder();
/** destructor */
virtual ~CECOCDiscriminantEncoder();
/** set features */
void set_features(CDenseFeatures<float64_t> *features);
/** set labels */
void set_labels(CLabels *labels);
/** set sffs iterations
* @param iterations number of sffs iterations
*/
void set_sffs_iterations(int32_t iterations) { m_iterations = iterations; }
/** get sffs iterations
*/
int32_t get_sffs_iterations() const { return m_iterations; }
/** get name */
virtual const char* get_name() const { return "ECOCDiscriminantEncoder"; }
/** init codebook.
* @param num_classes number of classes in this problem
*/
virtual SGMatrix<int32_t> create_codebook(int32_t num_classes);
protected:
/** init parameters */
void init();
#ifndef DOXYGEN_SHOULD_SKIP_THIS
void binary_partition(const std::vector<int32_t>& classes);
void run_sffs(std::vector<int32_t>& part1, std::vector<int32_t>& part2);
float64_t sffs_iteration(float64_t MI, std::vector<int32_t>& part1, std::set<int32_t>& idata1,
std::vector<int32_t>& part2, std::set<int32_t>& idata2);
float64_t compute_MI(const std::set<int32_t>& idata1, const std::set<int32_t>& idata2);
void compute_hist(int32_t i, float64_t max_val, float64_t min_val,
const std::set<int32_t>& idata, int32_t *hist);
int32_t m_iterations;
int32_t m_num_trees;
SGMatrix<int32_t> m_codebook;
int32_t m_code_idx;
CLabels *m_labels;
CDenseFeatures<float64_t> *m_features;
SGMatrix<float64_t> m_feats;
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
};
} /* shogun */
#endif /* end of include guard: ECOCDISCRIMINANTENCODER_H__ */
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