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ECOCRandomDenseEncoder.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) 2012 Chiyuan Zhang
8  * Copyright (C) 2012 Chiyuan Zhang
9  */
10 
11 #ifndef ECOCRANDOMDENSEENCODER_H__
12 #define ECOCRANDOMDENSEENCODER_H__
13 
14 #include <shogun/lib/config.h>
15 
17 
18 namespace shogun
19 {
20 
25 {
26 public:
34  CECOCRandomDenseEncoder(int32_t maxiter=10000, int32_t codelen=0, float64_t pposone=0.5);
35 
38 
42  void set_probability(float64_t pposone);
43 
45  virtual const char* get_name() const { return "ECOCRandomDenseEncoder"; }
46 
50  virtual SGMatrix<int32_t> create_codebook(int32_t num_classes);
51 
61  int32_t get_default_code_length(int32_t num_classes) const
62  {
63  return static_cast<int32_t>(CMath::round(10 * CMath::log(num_classes)));
64  }
65 
66 protected:
67  int32_t m_maxiter;
68  int32_t m_codelen;
70 
71 private:
75  bool check_probability(float64_t pposone)
76  {
77  if (pposone >= 0.999 || pposone <= 0.0001)
78  return false;
79  return true;
80  }
81 
83  void init();
84 };
85 
86 } // namespace shogun
87 
88 #endif /* end of include guard: ECOCRANDOMDENSEENCODER_H__ */
89 

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