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HistogramWordStringKernel.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) 1999-2009 Soeren Sonnenburg
8  * Written (W) 1999-2008 Gunnar Raetsch
9  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
10  */
11 
12 #ifndef _HISTOGRAMWORDKERNEL_H___
13 #define _HISTOGRAMWORDKERNEL_H___
14 
15 #include <shogun/lib/common.h>
19 
20 namespace shogun
21 {
22  class CPluginEstimate;
23  template <class T> class CStringFeatures;
27 {
28  public:
31 
37  CHistogramWordStringKernel(int32_t size, CPluginEstimate* pie);
38 
47  CPluginEstimate* pie);
48 
50 
57  virtual bool init(CFeatures* l, CFeatures* r);
58 
60  virtual void cleanup();
61 
66  virtual EKernelType get_kernel_type() { return K_HISTOGRAM; }
67 
72  virtual const char* get_name() const { return "HistogramWordStringKernel" ; }
73 
74  protected:
83  float64_t compute(int32_t idx_a, int32_t idx_b);
84 
91  inline int32_t compute_index(int32_t position, uint16_t symbol)
92  {
93  return position*num_symbols+symbol+1;
94  }
95 
96  private:
97  void init();
98 
99  protected:
102 
107 
112 
117 
122 
124  int32_t num_params;
126  int32_t num_params2;
128  int32_t num_symbols;
131 
134 };
135 }
136 #endif /* _HISTOGRAMWORDKERNEL_H__ */
EKernelType
Definition: Kernel.h:51
The HistogramWordString computes the TOP kernel on inhomogeneous Markov Chains.
double float64_t
Definition: common.h:48
virtual bool init(CFeatures *l, CFeatures *r)
virtual const char * get_name() const
The class Features is the base class of all feature objects.
Definition: Features.h:62
class PluginEstimate
float64_t compute(int32_t idx_a, int32_t idx_b)
int32_t compute_index(int32_t position, uint16_t symbol)
Template class StringKernel, is the base class of all String Kernels.
Definition: StringKernel.h:24

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