SparseGaussianKernel.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) 1999-2008 Soeren Sonnenburg
00008  * Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _SPARSEGAUSSIANKERNEL_H___
00012 #define _SPARSEGAUSSIANKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SparseKernel.h"
00016 #include "features/SparseFeatures.h"
00017 
00019 class CSparseGaussianKernel: public CSparseKernel<DREAL>
00020 {
00021     public:
00027         CSparseGaussianKernel(INT size, double width);
00028 
00035         CSparseGaussianKernel(
00036             CSparseFeatures<DREAL>* l, CSparseFeatures<DREAL>* r,
00037             double width);
00038 
00039         virtual ~CSparseGaussianKernel();
00040 
00047         virtual bool init(CFeatures* l, CFeatures* r);
00048 
00050         virtual void cleanup();
00051 
00057         virtual bool load_init(FILE* src);
00058 
00064         virtual bool save_init(FILE* dest);
00065 
00070         virtual EKernelType get_kernel_type() { return K_SPARSEGAUSSIAN; }
00071 
00076         inline virtual EFeatureType get_feature_type() { return F_DREAL; }
00077 
00082         virtual const CHAR* get_name() { return "SparseGaussian" ; } ;
00083 
00084     protected:
00093         virtual DREAL compute(INT idx_a, INT idx_b);
00094 
00095     protected:
00097         double width;
00099         DREAL* sq_lhs;
00101         DREAL* sq_rhs;
00102 };
00103 
00104 #endif /* _SPARSEGAUSSIANKERNEL_H__ */

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