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00012 #ifndef _SVMOCAS_H___
00013 #define _SVMOCAS_H___
00014
00015 #include "lib/common.h"
00016 #include "classifier/LinearClassifier.h"
00017 #include "features/DotFeatures.h"
00018 #include "features/Labels.h"
00019
00020 namespace shogun
00021 {
00022 enum E_SVM_TYPE
00023 {
00024 SVM_OCAS = 0,
00025 SVM_BMRM = 1
00026 };
00027
00029 class CSVMOcas : public CLinearClassifier
00030 {
00031 public:
00036 CSVMOcas(E_SVM_TYPE type);
00037
00044 CSVMOcas(
00045 float64_t C, CDotFeatures* traindat,
00046 CLabels* trainlab);
00047 virtual ~CSVMOcas();
00048
00053 virtual inline EClassifierType get_classifier_type() { return CT_SVMOCAS; }
00054
00063 virtual bool train(CFeatures* data=NULL);
00064
00071 inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; }
00072
00077 inline float64_t get_C1() { return C1; }
00078
00083 inline float64_t get_C2() { return C2; }
00084
00089 inline void set_epsilon(float64_t eps) { epsilon=eps; }
00090
00095 inline float64_t get_epsilon() { return epsilon; }
00096
00101 inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00102
00107 inline bool get_bias_enabled() { return use_bias; }
00108
00113 inline void set_bufsize(int32_t sz) { bufsize=sz; }
00114
00119 inline int32_t get_bufsize() { return bufsize; }
00120
00121 protected:
00130 static void compute_W(
00131 float64_t *sq_norm_W, float64_t *dp_WoldW, float64_t *alpha,
00132 uint32_t nSel, void* ptr);
00133
00140 static float64_t update_W(float64_t t, void* ptr );
00141
00150 static void add_new_cut(
00151 float64_t *new_col_H, uint32_t *new_cut, uint32_t cut_length,
00152 uint32_t nSel, void* ptr );
00153
00159 static void compute_output( float64_t *output, void* ptr );
00160
00167 static void sort( float64_t* vals, uint32_t* idx, uint32_t size);
00168
00170 inline virtual const char* get_name() const { return "SVMOcas"; }
00171
00172 protected:
00174 bool use_bias;
00176 int32_t bufsize;
00178 float64_t C1;
00180 float64_t C2;
00182 float64_t epsilon;
00184 E_SVM_TYPE method;
00185
00187 float64_t* old_w;
00189 float64_t old_bias;
00191 float64_t* tmp_a_buf;
00193 float64_t* lab;
00194
00197 float64_t** cp_value;
00199 uint32_t** cp_index;
00201 uint32_t* cp_nz_dims;
00203 float64_t* cp_bias;
00204 };
00205 }
00206 #endif