SHOGUN
v3.2.0
|
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) 2009-2010 Soeren Sonnenburg 00008 * Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society 00009 * Copyright (C) 2010 Berlin Institute of Technology 00010 * 00011 */ 00012 00013 #ifndef _COMBINEDDOTFEATURES_H___ 00014 #define _COMBINEDDOTFEATURES_H___ 00015 00016 #include <shogun/lib/common.h> 00017 #include <shogun/lib/DynamicObjectArray.h> 00018 #include <shogun/features/DotFeatures.h> 00019 00020 namespace shogun 00021 { 00022 class CFeatures; 00023 class CDynamicObjectArray; 00043 class CCombinedDotFeatures : public CDotFeatures 00044 { 00045 public: 00047 CCombinedDotFeatures(); 00048 00050 CCombinedDotFeatures(const CCombinedDotFeatures & orig); 00051 00053 virtual ~CCombinedDotFeatures(); 00054 00059 virtual int32_t get_num_vectors() const 00060 { 00061 return num_vectors; 00062 } 00063 00068 virtual int32_t get_dim_feature_space() const 00069 { 00070 return num_dimensions; 00071 } 00072 00080 virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2); 00081 00088 virtual float64_t dense_dot(int32_t vec_idx1, float64_t* vec2, int32_t vec2_len); 00089 00101 virtual void dense_dot_range(float64_t* output, int32_t start, 00102 int32_t stop, float64_t* alphas, float64_t* vec, 00103 int32_t dim, float64_t b); 00104 00116 virtual void dense_dot_range_subset(int32_t* sub_index, int32_t num, 00117 float64_t* output, float64_t* alphas, float64_t* vec, 00118 int32_t dim, float64_t b); 00119 00128 virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1, 00129 float64_t* vec2, int32_t vec2_len, bool abs_val=false); 00130 00136 virtual int32_t get_nnz_features_for_vector(int32_t num); 00137 00142 virtual EFeatureType get_feature_type() const 00143 { 00144 return F_DREAL; 00145 } 00146 00151 virtual EFeatureClass get_feature_class() const 00152 { 00153 return C_COMBINED_DOT; 00154 } 00155 00156 #ifndef DOXYGEN_SHOULD_SKIP_THIS 00157 00158 struct combined_feature_iterator 00159 { 00161 CDotFeatures* f; 00163 void* iterator; 00165 int32_t vector_index; 00166 }; 00167 #endif 00168 00178 virtual void* get_feature_iterator(int32_t vector_index); 00179 00190 virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator); 00191 00197 virtual void free_feature_iterator(void* iterator); 00198 00203 virtual CFeatures* duplicate() const; 00204 00206 void list_feature_objs(); 00207 00213 CDotFeatures* get_feature_obj(int32_t idx); 00214 00222 bool insert_feature_obj(CDotFeatures* obj, int32_t idx); 00223 00229 bool append_feature_obj(CDotFeatures* obj); 00230 00236 bool delete_feature_obj(int32_t idx); 00237 00242 int32_t get_num_feature_obj(); 00243 00247 virtual SGVector<float64_t> get_subfeature_weights(); 00248 00253 virtual void set_subfeature_weights(SGVector<float64_t> weights); 00254 00256 virtual const char* get_name() const { return "CombinedDotFeatures"; } 00257 00258 protected: 00260 void update_dim_feature_space_and_num_vec(); 00261 00262 private: 00263 void init(); 00264 00265 protected: 00267 CDynamicObjectArray* feature_array; 00268 00270 int32_t iterator_idx; 00272 int32_t num_vectors; 00274 int32_t num_dimensions; 00275 }; 00276 } 00277 #endif // _DOTFEATURES_H___