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DiagKernel.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  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
9  */
10 
11 #ifndef _DIAGKERNEL_H___
12 #define _DIAGKERNEL_H___
13 
14 #include <shogun/lib/common.h>
15 #include <shogun/kernel/Kernel.h>
16 
17 namespace shogun
18 {
26 class CDiagKernel: public CKernel
27 {
28  public:
30  CDiagKernel();
31 
37  CDiagKernel(int32_t size, float64_t diag=1.0);
38 
46 
47  virtual ~CDiagKernel();
48 
55  virtual bool init(CFeatures* l, CFeatures* r);
56 
62  {
63  return F_ANY;
64  }
65 
71  {
72  return C_ANY;
73  }
74 
79  virtual EKernelType get_kernel_type() { return K_DIAG; }
80 
85  virtual const char* get_name() const { return "DiagKernel"; }
86 
87  protected:
96  virtual float64_t compute(int32_t idx_a, int32_t idx_b)
97  {
98  if (idx_a==idx_b)
99  return diag;
100  else
101  return 0;
102  }
103  private:
104  void init();
105 
106  protected:
109 };
110 }
111 #endif /* _DIAGKERNEL_H__ */
virtual EKernelType get_kernel_type()
Definition: DiagKernel.h:79
EKernelType
Definition: Kernel.h:51
The Diagonal Kernel returns a constant for the diagonal and zero otherwise.
Definition: DiagKernel.h:26
virtual bool init(CFeatures *l, CFeatures *r)
Definition: DiagKernel.cpp:45
virtual const char * get_name() const
Definition: DiagKernel.h:85
EFeatureClass
shogun feature class
Definition: FeatureTypes.h:35
virtual EFeatureClass get_feature_class()
Definition: DiagKernel.h:70
double float64_t
Definition: common.h:48
virtual EFeatureType get_feature_type()
Definition: DiagKernel.h:61
EFeatureType
shogun feature type
Definition: FeatureTypes.h:16
virtual ~CDiagKernel()
Definition: DiagKernel.cpp:41
The class Features is the base class of all feature objects.
Definition: Features.h:62
virtual float64_t compute(int32_t idx_a, int32_t idx_b)
Definition: DiagKernel.h:96
The Kernel base class.
Definition: Kernel.h:150

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