SHOGUN
v1.1.0
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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) 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 #ifndef _DOTFEATURES_H___ 00013 #define _DOTFEATURES_H___ 00014 00015 #include <shogun/lib/common.h> 00016 #include <shogun/features/Features.h> 00017 00018 namespace shogun 00019 { 00041 class CDotFeatures : public CFeatures 00042 { 00043 public: 00044 00049 CDotFeatures(int32_t size=0); 00050 00052 CDotFeatures(const CDotFeatures & orig); 00053 00058 CDotFeatures(CFile* loader); 00059 00060 virtual ~CDotFeatures() { } 00061 00069 virtual int32_t get_dim_feature_space() const=0; 00070 00078 virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2)=0; 00079 00086 virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len)=0; 00087 00096 virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1, float64_t* vec2, int32_t vec2_len, bool abs_val=false)=0; 00097 00111 virtual void dense_dot_range(float64_t* output, int32_t start, int32_t stop, float64_t* alphas, float64_t* vec, int32_t dim, float64_t b); 00112 00124 virtual void dense_dot_range_subset(int32_t* sub_index, int32_t num, 00125 float64_t* output, float64_t* alphas, float64_t* vec, int32_t dim, float64_t b); 00126 00129 static void* dense_dot_range_helper(void* p); 00130 00138 virtual int32_t get_nnz_features_for_vector(int32_t num)=0; 00139 00144 inline float64_t get_combined_feature_weight() { return combined_weight; } 00145 00150 inline void set_combined_feature_weight(float64_t nw) { combined_weight=nw; } 00151 00156 SGMatrix<float64_t> get_computed_dot_feature_matrix(); 00157 00162 SGVector<float64_t> get_computed_dot_feature_vector(int32_t num); 00163 00165 void benchmark_add_to_dense_vector(int32_t repeats=5); 00166 00168 void benchmark_dense_dot_range(int32_t repeats=5); 00169 00179 virtual void* get_feature_iterator(int32_t vector_index)=0; 00180 00191 virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator)=0; 00192 00198 virtual void free_feature_iterator(void* iterator)=0; 00199 00204 virtual SGVector<float64_t> get_mean(); 00205 00210 virtual SGMatrix<float64_t> get_cov(); 00211 00212 protected: 00219 void display_progress(int32_t start, int32_t stop, int32_t v); 00220 00221 private: 00222 void init(); 00223 00224 protected: 00225 00227 float64_t combined_weight; 00228 }; 00229 } 00230 #endif // _DOTFEATURES_H___