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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 
85  virtual float64_t dense_dot_sgvec(int32_t vec_idx1, const SGVector<float64_t> vec2);
86 
93  virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len)=0;
94 
103  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;
104 
118  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);
119 
131  virtual void dense_dot_range_subset(int32_t* sub_index, int32_t num,
132  float64_t* output, float64_t* alphas, float64_t* vec, int32_t dim, float64_t b);
133 
136  static void* dense_dot_range_helper(void* p);
137 
145  virtual int32_t get_nnz_features_for_vector(int32_t num)=0;
146 
152 
158 
164 
170 
172  void benchmark_add_to_dense_vector(int32_t repeats=5);
173 
175  void benchmark_dense_dot_range(int32_t repeats=5);
176 
186  virtual void* get_feature_iterator(int32_t vector_index)=0;
187 
198  virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator)=0;
199 
205  virtual void free_feature_iterator(void* iterator)=0;
206 
211  virtual SGVector<float64_t> get_mean();
212 
218 
223  virtual SGMatrix<float64_t> get_cov();
224 
230 
231  protected:
238  void display_progress(int32_t start, int32_t stop, int32_t v);
239 
240  private:
241  void init();
242 
243  protected:
244 
247 };
248 }
249 #endif // _DOTFEATURES_H___

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