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PolyKernel.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) 1999-2010 Soeren Sonnenburg
8  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
9  * Copyright (C) 2010 Berlin Institute of Technology
10  */
11 
12 #ifndef _POLYKERNEL_H___
13 #define _POLYKERNEL_H___
14 
15 #include <shogun/lib/config.h>
16 
17 #include <shogun/lib/common.h>
20 
21 namespace shogun
22 {
23  class CDotFeatures;
24 
38 class CPolyKernel: public CDotKernel
39 {
40  public:
42  CPolyKernel();
43 
53  int32_t d, bool inhom, int32_t size=10);
54 
61  CPolyKernel(int32_t size, int32_t degree, bool inhomogene=true);
62 
63  virtual ~CPolyKernel();
64 
71  virtual bool init(CFeatures* l, CFeatures* r);
72 
74  virtual void cleanup();
75 
80  virtual EKernelType get_kernel_type() { return K_POLY; }
81 
86  virtual const char* get_name() const { return "PolyKernel"; };
87 
89  virtual int32_t get_degree() { return degree; }
90 
91  protected:
100  virtual float64_t compute(int32_t idx_a, int32_t idx_b);
101 
102  private:
103  void init();
104 
105  protected:
107  int32_t degree;
110 };
111 }
112 #endif /* _POLYKERNEL_H__ */

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