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00012 #ifndef _SVMOCAS_H___
00013 #define _SVMOCAS_H___
00014
00015 #include <shogun/lib/common.h>
00016 #include <shogun/machine/LinearMachine.h>
00017 #include <shogun/classifier/svm/libocas.h>
00018 #include <shogun/features/DotFeatures.h>
00019 #include <shogun/features/Labels.h>
00020
00021 namespace shogun
00022 {
00023 #ifndef DOXYGEN_SHOULD_SKIP_THIS
00024 enum E_SVM_TYPE
00025 {
00026 SVM_OCAS = 0,
00027 SVM_BMRM = 1
00028 };
00029 #endif
00030
00032 class CSVMOcas : public CLinearMachine
00033 {
00034 public:
00036 CSVMOcas(void);
00037
00042 CSVMOcas(E_SVM_TYPE type);
00043
00050 CSVMOcas(
00051 float64_t C, CDotFeatures* traindat,
00052 CLabels* trainlab);
00053 virtual ~CSVMOcas();
00054
00059 virtual inline EClassifierType get_classifier_type() { return CT_SVMOCAS; }
00060
00067 inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; }
00068
00073 inline float64_t get_C1() { return C1; }
00074
00079 inline float64_t get_C2() { return C2; }
00080
00085 inline void set_epsilon(float64_t eps) { epsilon=eps; }
00086
00091 inline float64_t get_epsilon() { return epsilon; }
00092
00097 inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00098
00103 inline bool get_bias_enabled() { return use_bias; }
00104
00109 inline void set_bufsize(int32_t sz) { bufsize=sz; }
00110
00115 inline int32_t get_bufsize() { return bufsize; }
00116
00117 protected:
00126 static void compute_W(
00127 float64_t *sq_norm_W, float64_t *dp_WoldW, float64_t *alpha,
00128 uint32_t nSel, void* ptr);
00129
00136 static float64_t update_W(float64_t t, void* ptr );
00137
00146 static int add_new_cut(
00147 float64_t *new_col_H, uint32_t *new_cut, uint32_t cut_length,
00148 uint32_t nSel, void* ptr );
00149
00155 static int compute_output( float64_t *output, void* ptr );
00156
00163 static int sort( float64_t* vals, float64_t* data, uint32_t size);
00164
00166 static inline void print(ocas_return_value_T value)
00167 {
00168 return;
00169 }
00170
00171 protected:
00180 virtual bool train_machine(CFeatures* data=NULL);
00181
00183 inline virtual const char* get_name() const { return "SVMOcas"; }
00184 private:
00185 void init();
00186
00187 protected:
00189 bool use_bias;
00191 int32_t bufsize;
00193 float64_t C1;
00195 float64_t C2;
00197 float64_t epsilon;
00199 E_SVM_TYPE method;
00200
00202 float64_t* old_w;
00204 float64_t old_bias;
00206 float64_t* tmp_a_buf;
00208 SGVector<float64_t> lab;
00209
00212 float64_t** cp_value;
00214 uint32_t** cp_index;
00216 uint32_t* cp_nz_dims;
00218 float64_t* cp_bias;
00219 };
00220 }
00221 #endif