PolyMatchStringKernel.h

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 3 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * Written (W) 1999-2009 Soeren Sonnenburg
00008  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _POLYMATCHSTRINGKERNEL_H___
00012 #define _POLYMATCHSTRINGKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/StringKernel.h"
00016 
00017 namespace shogun
00018 {
00036 class CPolyMatchStringKernel: public CStringKernel<char>
00037 {
00038     public:
00045         CPolyMatchStringKernel(int32_t size, int32_t degree, bool inhomogene);
00046 
00054         CPolyMatchStringKernel(
00055             CStringFeatures<char>* l, CStringFeatures<char>* r,
00056             int32_t degree, bool inhomogene);
00057 
00058         virtual ~CPolyMatchStringKernel();
00059 
00066         virtual bool init(CFeatures* l, CFeatures* r);
00067 
00069         virtual void cleanup();
00070 
00075         virtual EKernelType get_kernel_type()
00076         {
00077             return K_POLYMATCH;
00078         }
00079 
00084         virtual const char* get_name() const { return "PolyMatchString"; }
00085 
00090         void set_rescaling_enabled(bool n)
00091         {
00092             rescaling=n;
00093         }
00094 
00095         bool get_rescaling_enabled()
00096         {
00097             return rescaling;
00098         }
00099 
00100     protected:
00109         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00110 
00111     protected:
00113         int32_t degree;
00115         bool inhomogene;
00117         bool rescaling;
00118 };
00119 }
00120 #endif /* _POLYMATCHSTRINGKERNEL_H___ */
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