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DotFeatures.h
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1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 3 of the License, or
5  * (at your option) any later version.
6  *
7  * Written (W) 2009-2010 Soeren Sonnenburg
8  * Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society
9  * Copyright (C) 2010 Berlin Institute of Technology
10  */
11 
12 #ifndef _DOTFEATURES_H___
13 #define _DOTFEATURES_H___
14 
15 #include <shogun/lib/common.h>
17 
18 namespace shogun
19 {
41 class CDotFeatures : public CFeatures
42 {
43  public:
44 
49  CDotFeatures(int32_t size=0);
50 
52  CDotFeatures(const CDotFeatures & orig);
53 
58  CDotFeatures(CFile* loader);
59 
60  virtual ~CDotFeatures() { }
61 
69  virtual int32_t get_dim_feature_space() const=0;
70 
78  virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2)=0;
79 
86  virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len)=0;
87 
96  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;
97 
111  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);
112 
124  virtual void dense_dot_range_subset(int32_t* sub_index, int32_t num,
125  float64_t* output, float64_t* alphas, float64_t* vec, int32_t dim, float64_t b);
126 
129  static void* dense_dot_range_helper(void* p);
130 
138  virtual int32_t get_nnz_features_for_vector(int32_t num)=0;
139 
145 
151 
157 
163 
165  void benchmark_add_to_dense_vector(int32_t repeats=5);
166 
168  void benchmark_dense_dot_range(int32_t repeats=5);
169 
179  virtual void* get_feature_iterator(int32_t vector_index)=0;
180 
191  virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator)=0;
192 
198  virtual void free_feature_iterator(void* iterator)=0;
199 
204  virtual SGVector<float64_t> get_mean();
205 
210  virtual SGMatrix<float64_t> get_cov();
211 
212  protected:
219  void display_progress(int32_t start, int32_t stop, int32_t v);
220 
221  private:
222  void init();
223 
224  protected:
225 
228 };
229 }
230 #endif // _DOTFEATURES_H___

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