SHOGUN
v3.2.0
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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) 2011 Shashwat Lal Das 00008 * Written (W) 2012 Heiko Strathmann 00009 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society 00010 */ 00011 #ifndef _STREAMINGDENSEFEATURES__H__ 00012 #define _STREAMINGDENSEFEATURES__H__ 00013 00014 #include <shogun/lib/common.h> 00015 #include <shogun/features/streaming/StreamingDotFeatures.h> 00016 #include <shogun/features/DenseFeatures.h> 00017 #include <shogun/lib/DataType.h> 00018 #include <shogun/io/streaming/InputParser.h> 00019 00020 namespace shogun 00021 { 00028 template<class T> class CStreamingDenseFeatures: 00029 public CStreamingDotFeatures 00030 { 00031 public: 00032 00040 CStreamingDenseFeatures(); 00041 00050 CStreamingDenseFeatures(CStreamingFile* file, bool is_labelled, 00051 int32_t size); 00052 00060 CStreamingDenseFeatures(CDenseFeatures<T>* dense_features, float64_t* lab= 00061 NULL); 00062 00068 ~CStreamingDenseFeatures(); 00069 00079 virtual void set_vector_reader(); 00080 00090 virtual void set_vector_and_label_reader(); 00091 00097 virtual void start_parser(); 00098 00104 virtual void end_parser(); 00105 00110 virtual void reset_stream(); 00111 00120 virtual bool get_next_example(); 00121 00127 SGVector<T> get_vector(); 00128 00136 virtual float64_t get_label(); 00137 00144 virtual void release_example(); 00145 00153 virtual int32_t get_dim_feature_space() const; 00154 00162 virtual float32_t dot(SGVector<T> vec); 00163 00174 virtual float32_t dot(CStreamingDotFeatures *df); 00175 00183 virtual float32_t dense_dot(const float32_t* vec2, int32_t vec2_len); 00184 00192 virtual float64_t dense_dot(const float64_t* vec2, int32_t vec2_len); 00193 00203 virtual void add_to_dense_vec(float32_t alpha, float32_t* vec2, 00204 int32_t vec2_len, bool abs_val=false); 00205 00215 virtual void add_to_dense_vec(float64_t alpha, float64_t* vec2, 00216 int32_t vec2_len, bool abs_val=false); 00217 00222 virtual int32_t get_nnz_features_for_vector(); 00223 00229 int32_t get_num_features(); 00230 00236 virtual EFeatureType get_feature_type() const; 00237 00243 virtual EFeatureClass get_feature_class() const; 00244 00250 virtual CFeatures* duplicate() const; 00251 00257 virtual const char* get_name() const 00258 { 00259 return "StreamingDenseFeatures"; 00260 } 00261 00267 virtual int32_t get_num_vectors() const; 00268 00275 virtual CFeatures* get_streamed_features(index_t num_elements); 00276 00277 private: 00282 void init(); 00283 00291 void init(CStreamingFile *file, bool is_labelled, int32_t size); 00292 00293 protected: 00294 00296 float32_t combined_weight; 00297 00299 CInputParser<T> parser; 00300 00302 SGVector<T> current_vector; 00303 00305 float64_t current_label; 00306 }; 00307 } 00308 #endif // _STREAMINGDENSEFEATURES__H__