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__ */