00001 /* 00002 * This program is free software; you can redistribute it and/or modify 00003 * it under the terms of the GNU General Public License as published by 00004 * the Free Software Foundation; either version 3 of the License, or 00005 * (at your option) any later version. 00006 * 00007 * Written (W) 2012 Philippe Tillet 00008 */ 00009 00010 #ifndef _NEAREST_CENTROID_H__ 00011 #define _NEAREST_CENTROID_H__ 00012 00013 #include <stdio.h> 00014 #include <shogun/lib/common.h> 00015 #include <shogun/io/SGIO.h> 00016 #include <shogun/features/Features.h> 00017 #include <shogun/features/DenseFeatures.h> 00018 #include <shogun/distance/Distance.h> 00019 #include <shogun/lib/CoverTree.h> 00020 #include <shogun/machine/DistanceMachine.h> 00021 00022 namespace shogun 00023 { 00024 00025 class CDistanceMachine; 00026 00033 class CNearestCentroid : public CDistanceMachine{ 00034 00035 public: 00036 00038 MACHINE_PROBLEM_TYPE(PT_MULTICLASS); 00039 00043 CNearestCentroid(); 00044 00050 CNearestCentroid(CDistance* distance, CLabels* trainlab); 00051 00054 virtual ~CNearestCentroid(); 00055 00060 void set_shrinking(float64_t shrinking) { 00061 m_shrinking = shrinking ; 00062 } 00063 00068 float64_t get_shrinking() const{ 00069 return m_shrinking; 00070 } 00071 00076 CDenseFeatures<float64_t>* get_centroids() const{ 00077 return m_centroids; 00078 } 00079 00080 protected: 00089 virtual bool train_machine(CFeatures* data=NULL); 00090 00096 private: 00097 void init(); 00098 00099 protected: 00101 int32_t m_num_classes; 00102 00104 float64_t m_shrinking; 00105 00107 CDenseFeatures<float64_t>* m_centroids; 00108 00110 bool m_is_trained; 00111 }; 00112 00113 } 00114 00115 #endif