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) 1999-2009 Soeren Sonnenburg 00008 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #ifndef _SVM_H___ 00012 #define _SVM_H___ 00013 00014 #include "lib/common.h" 00015 #include "features/Features.h" 00016 #include "kernel/Kernel.h" 00017 #include "classifier/KernelMachine.h" 00018 00019 namespace shogun 00020 { 00021 00022 class CMKL; 00023 00046 class CSVM : public CKernelMachine 00047 { 00048 public: 00052 CSVM(int32_t num_sv=0); 00053 00061 CSVM(float64_t C, CKernel* k, CLabels* lab); 00062 virtual ~CSVM(); 00063 00066 void set_defaults(int32_t num_sv=0); 00067 00068 00076 virtual float64_t* get_linear_term_ptr(index_t* len); 00077 00078 00085 virtual void set_linear_term(float64_t* linear_term, index_t len); 00086 00087 00091 bool load(FILE* svm_file); 00092 00096 bool save(FILE* svm_file); 00097 00102 inline void set_nu(float64_t nue) { nu=nue; } 00103 00104 00113 inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; } 00114 00115 00120 inline void set_epsilon(float64_t eps) { epsilon=eps; } 00121 00126 inline void set_tube_epsilon(float64_t eps) { tube_epsilon=eps; } 00127 00132 inline float64_t get_tube_epsilon() { return tube_epsilon; } 00133 00138 inline void set_qpsize(int32_t qps) { qpsize=qps; } 00139 00144 inline float64_t get_epsilon() { return epsilon; } 00145 00150 inline float64_t get_nu() { return nu; } 00151 00156 inline float64_t get_C1() { return C1; } 00157 00162 inline float64_t get_C2() { return C2; } 00163 00168 inline int32_t get_qpsize() { return qpsize; } 00169 00174 inline void set_shrinking_enabled(bool enable) 00175 { 00176 use_shrinking=enable; 00177 } 00178 00183 inline bool get_shrinking_enabled() 00184 { 00185 return use_shrinking; 00186 } 00187 00192 float64_t compute_svm_dual_objective(); 00193 00198 float64_t compute_svm_primal_objective(); 00199 00204 inline void set_objective(float64_t v) 00205 { 00206 objective=v; 00207 } 00208 00213 inline float64_t get_objective() 00214 { 00215 return objective; 00216 } 00217 00225 void set_callback_function(CMKL* m, bool (*cb) 00226 (CMKL* mkl, const float64_t* sumw, const float64_t suma)); 00227 00229 inline virtual const char* get_name() const { return "SVM"; } 00230 00231 protected: 00232 00238 virtual float64_t* get_linear_term_array(); 00239 00241 float64_t* m_linear_term; 00242 index_t m_linear_term_len; 00243 00245 bool svm_loaded; 00247 float64_t epsilon; 00249 float64_t tube_epsilon; 00251 float64_t nu; 00253 float64_t C1; 00255 float64_t C2; 00257 float64_t objective; 00259 int32_t qpsize; 00261 bool use_shrinking; 00262 00265 bool (*callback) (CMKL* mkl, const float64_t* sumw, const float64_t suma); 00268 CMKL* mkl; 00269 }; 00270 } 00271 #endif