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) 2007-2009 Soeren Sonnenburg 00008 * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #ifndef _LPBOOST_H___ 00012 #define _LPBOOST_H___ 00013 00014 #include <shogun/lib/config.h> 00015 #ifdef USE_CPLEX 00016 00017 #include <stdio.h> 00018 #include <shogun/lib/common.h> 00019 #include <shogun/lib/DynamicArray.h> 00020 00021 #include <shogun/features/Features.h> 00022 #include <shogun/features/SparseFeatures.h> 00023 #include <shogun/machine/LinearMachine.h> 00024 00025 namespace shogun 00026 { 00048 class CLPBoost : public CLinearClassifier 00049 { 00050 public: 00051 CLPBoost(); 00052 virtual ~CLPBoost(); 00053 00054 inline virtual EClassifierType get_classifier_type() 00055 { 00056 return CT_LPBOOST; 00057 } 00058 00059 bool init(int32_t num_vec); 00060 void cleanup(); 00061 00066 virtual inline void set_features(CDotFeatures* feat) 00067 { 00068 if (feat->get_feature_class() != C_SPARSE || 00069 feat->get_feature_type() != F_DREAL) 00070 SG_ERROR("LPBoost requires SPARSE REAL valued features\n"); 00071 00072 CLinearClassifier::set_features(feat); 00073 } 00074 00081 inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; } 00082 00083 inline float64_t get_C1() { return C1; } 00084 inline float64_t get_C2() { return C2; } 00085 00086 inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; } 00087 inline bool get_bias_enabled() { return use_bias; } 00088 00089 inline void set_epsilon(float64_t eps) { epsilon=eps; } 00090 inline float64_t get_epsilon() { return epsilon; } 00091 00092 float64_t find_max_violator(int32_t& max_dim); 00093 00095 inline virtual const char* get_name() const { return "LPBoost"; } 00096 00097 protected: 00106 virtual bool train_machine(CFeatures* data=NULL); 00107 00108 protected: 00109 float64_t C1; 00110 float64_t C2; 00111 bool use_bias; 00112 float64_t epsilon; 00113 00114 float64_t* u; 00115 CDynamicArray<int32_t>* dim; 00116 00117 int32_t num_sfeat; 00118 int32_t num_svec; 00119 SGSparseVector<float64_t>* sfeat; 00120 00121 }; 00122 } 00123 #endif //USE_CPLEX 00124 #endif //_LPBOOST_H___