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ExplicitSpecFeatures.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 Soeren Sonnenburg
8  * Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society
9  */
10 
11 #ifndef _EXPLICITSPECFEATURES_H___
12 #define _EXPLICITSPECFEATURES_H___
13 
14 #include <shogun/lib/common.h>
17 
18 namespace shogun
19 {
20 template <class ST> class CStringFeatures;
21 
27 {
28  public:
31 
37  CExplicitSpecFeatures(CStringFeatures<uint16_t>* str, bool normalize=true);
38 
41 
43  virtual ~CExplicitSpecFeatures();
44 
49  virtual CFeatures* duplicate() const;
50 
58  virtual int32_t get_dim_feature_space() const;
59 
67  virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2);
68 
75  virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len);
76 
85  virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1,
86  float64_t* vec2, int32_t vec2_len, bool abs_val=false);
87 
88  #ifndef DOXYGEN_SHOULD_SKIP_THIS
89 
90  struct explicit_spec_feature_iterator
91  {
93  uint16_t* vec;
95  int32_t vidx;
97  int32_t vlen;
99  bool vfree;
100 
102  int32_t index;
103 
104  };
105  #endif
106 
116  virtual void* get_feature_iterator(int32_t vector_index);
117 
128  virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator);
129 
135  virtual void free_feature_iterator(void* iterator);
136 
142  virtual int32_t get_nnz_features_for_vector(int32_t num);
143 
148  virtual EFeatureType get_feature_type() const;
149 
154  virtual EFeatureClass get_feature_class() const;
155 
160  virtual int32_t get_num_vectors() const;
161 
163  virtual const char* get_name() const { return "ExplicitSpecFeatures"; }
164 
165  protected:
171 
173  void delete_kmer_spectrum();
174 
175  protected:
179  int32_t num_strings;
181  int32_t alphabet_size;
182 
184  int32_t spec_size;
187 };
188 }
189 #endif // _EXPLICITSPECFEATURES_H___

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