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DistanceKernel.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) 2007-2009 Christian Gehl
8  * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society
9  */
10 
11 #include <shogun/lib/config.h>
12 
13 
14 #ifndef _DISTANCEKERNEL_H___
15 #define _DISTANCEKERNEL_H___
16 
17 #include <shogun/lib/common.h>
18 #include <shogun/kernel/Kernel.h>
20 
21 namespace shogun
22 {
23  class CDistance;
24 
33 class CDistanceKernel: public CKernel
34 {
35  public:
38 
45  CDistanceKernel(int32_t cache, float64_t width, CDistance* dist);
46 
55  CFeatures *l, CFeatures *r, float64_t width, CDistance* dist);
56 
57  virtual ~CDistanceKernel();
58 
65  virtual bool init(CFeatures* l, CFeatures* r);
66 
70  virtual void register_params();
71 
76  virtual EKernelType get_kernel_type() { return K_DISTANCE; }
82 
88 
93  virtual const char* get_name() const { return "DistanceKernel"; }
94 
99  virtual void set_width(float64_t w)
100  {
101  width=w;
102  }
103 
108  virtual float64_t get_width() const
109  {
110  return width;
111  }
112 
113 
114  protected:
123  float64_t compute(int32_t idx_a, int32_t idx_b);
124 
129 };
130 }
131 #endif /* _DISTANCEKERNEL_H__ */

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