SHOGUN v0.9.0
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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 Vojtech Franc 00008 * Written (W) 2007-2009 Soeren Sonnenburg 00009 * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society 00010 */ 00011 00012 #ifndef _SVMOCAS_H___ 00013 #define _SVMOCAS_H___ 00014 00015 #include "lib/common.h" 00016 #include "classifier/LinearClassifier.h" 00017 #include "classifier/svm/libocas.h" 00018 #include "features/DotFeatures.h" 00019 #include "features/Labels.h" 00020 00021 namespace shogun 00022 { 00023 enum E_SVM_TYPE 00024 { 00025 SVM_OCAS = 0, 00026 SVM_BMRM = 1 00027 }; 00028 00030 class CSVMOcas : public CLinearClassifier 00031 { 00032 public: 00034 CSVMOcas(void); 00035 00040 CSVMOcas(E_SVM_TYPE type); 00041 00048 CSVMOcas( 00049 float64_t C, CDotFeatures* traindat, 00050 CLabels* trainlab); 00051 virtual ~CSVMOcas(); 00052 00057 virtual inline EClassifierType get_classifier_type() { return CT_SVMOCAS; } 00058 00067 virtual bool train(CFeatures* data=NULL); 00068 00075 inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; } 00076 00081 inline float64_t get_C1() { return C1; } 00082 00087 inline float64_t get_C2() { return C2; } 00088 00093 inline void set_epsilon(float64_t eps) { epsilon=eps; } 00094 00099 inline float64_t get_epsilon() { return epsilon; } 00100 00105 inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; } 00106 00111 inline bool get_bias_enabled() { return use_bias; } 00112 00117 inline void set_bufsize(int32_t sz) { bufsize=sz; } 00118 00123 inline int32_t get_bufsize() { return bufsize; } 00124 00125 protected: 00134 static void compute_W( 00135 float64_t *sq_norm_W, float64_t *dp_WoldW, float64_t *alpha, 00136 uint32_t nSel, void* ptr); 00137 00144 static float64_t update_W(float64_t t, void* ptr ); 00145 00154 static int add_new_cut( 00155 float64_t *new_col_H, uint32_t *new_cut, uint32_t cut_length, 00156 uint32_t nSel, void* ptr ); 00157 00163 static int compute_output( float64_t *output, void* ptr ); 00164 00171 static int sort( float64_t* vals, float64_t* data, uint32_t size); 00172 00174 static inline void print(ocas_return_value_T value) 00175 { 00176 return; 00177 } 00178 00180 inline virtual const char* get_name() const { return "SVMOcas"; } 00181 private: 00182 void init(); 00183 00184 protected: 00186 bool use_bias; 00188 int32_t bufsize; 00190 float64_t C1; 00192 float64_t C2; 00194 float64_t epsilon; 00196 E_SVM_TYPE method; 00197 00199 float64_t* old_w; 00201 float64_t old_bias; 00203 float64_t* tmp_a_buf; 00205 float64_t* lab; 00206 00209 float64_t** cp_value; 00211 uint32_t** cp_index; 00213 uint32_t* cp_nz_dims; 00215 float64_t* cp_bias; 00216 }; 00217 } 00218 #endif