Go to the documentation of this file.00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011 #ifndef _EXPLICITSPECFEATURES_H___
00012 #define _EXPLICITSPECFEATURES_H___
00013
00014 #include <shogun/lib/common.h>
00015 #include <shogun/features/DotFeatures.h>
00016 #include <shogun/features/StringFeatures.h>
00017
00018 namespace shogun
00019 {
00020 template <class ST> class CStringFeatures;
00021
00026 class CExplicitSpecFeatures : public CDotFeatures
00027 {
00028 public:
00030 CExplicitSpecFeatures();
00031
00037 CExplicitSpecFeatures(CStringFeatures<uint16_t>* str, bool normalize=true);
00038
00040 CExplicitSpecFeatures(const CExplicitSpecFeatures & orig);
00041
00043 virtual ~CExplicitSpecFeatures();
00044
00049 virtual CFeatures* duplicate() const;
00050
00058 virtual int32_t get_dim_feature_space() const;
00059
00067 virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2);
00068
00075 virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len);
00076
00085 virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1,
00086 float64_t* vec2, int32_t vec2_len, bool abs_val=false);
00087
00088 #ifndef DOXYGEN_SHOULD_SKIP_THIS
00089
00090 struct explicit_spec_feature_iterator
00091 {
00093 uint16_t* vec;
00095 int32_t vidx;
00097 int32_t vlen;
00099 bool vfree;
00100
00102 int32_t index;
00103
00104 };
00105 #endif
00106
00116 virtual void* get_feature_iterator(int32_t vector_index);
00117
00128 virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator);
00129
00135 virtual void free_feature_iterator(void* iterator);
00136
00142 virtual int32_t get_nnz_features_for_vector(int32_t num);
00143
00148 virtual EFeatureType get_feature_type();
00149
00154 virtual EFeatureClass get_feature_class();
00155
00160 virtual int32_t get_num_vectors() const;
00161
00166 virtual int32_t get_size();
00167
00169 inline virtual const char* get_name() const { return "ExplicitSpecFeatures"; }
00170
00171 protected:
00176 void obtain_kmer_spectrum(CStringFeatures<uint16_t>* str);
00177
00179 void delete_kmer_spectrum();
00180
00181 protected:
00183 bool use_normalization;
00185 int32_t num_strings;
00187 int32_t alphabet_size;
00188
00190 int32_t spec_size;
00192 float64_t** k_spectrum;
00193 };
00194 }
00195 #endif // _EXPLICITSPECFEATURES_H___