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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/config.h>
16 
17 #include <shogun/lib/common.h>
19 #include <shogun/lib/SGMatrix.h>
20 
21 namespace shogun
22 {
44 class CDotFeatures : public CFeatures
45 {
46  public:
47 
52  CDotFeatures(int32_t size=0);
53 
55  CDotFeatures(const CDotFeatures & orig);
56 
61  CDotFeatures(CFile* loader);
62 
63  virtual ~CDotFeatures() { }
64 
72  virtual int32_t get_dim_feature_space() const=0;
73 
81  virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2)=0;
82 
88  virtual float64_t dense_dot_sgvec(int32_t vec_idx1, const SGVector<float64_t> vec2);
89 
96  virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len)=0;
97 
106  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;
107 
121  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);
122 
134  virtual void dense_dot_range_subset(int32_t* sub_index, int32_t num,
135  float64_t* output, float64_t* alphas, float64_t* vec, int32_t dim, float64_t b);
136 
139  static void* dense_dot_range_helper(void* p);
140 
148  virtual int32_t get_nnz_features_for_vector(int32_t num)=0;
149 
155 
161 
167 
173 
175  void benchmark_add_to_dense_vector(int32_t repeats=5);
176 
178  void benchmark_dense_dot_range(int32_t repeats=5);
179 
189  virtual void* get_feature_iterator(int32_t vector_index)=0;
190 
201  virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator)=0;
202 
208  virtual void free_feature_iterator(void* iterator)=0;
209 
214  virtual SGVector<float64_t> get_mean();
215 
221 
226  virtual SGMatrix<float64_t> get_cov();
227 
233 
234  protected:
241  void display_progress(int32_t start, int32_t stop, int32_t v);
242 
243  private:
244  void init();
245 
246  protected:
247 
250 };
251 }
252 #endif // _DOTFEATURES_H___

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