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 * Based on GaussianKernel, Written (W) 1999-2010 Soeren Sonnenburg 00008 * Written (W) 2011 Shashwat Lal Das 00009 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society 00010 */ 00011 00012 #include <shogun/lib/config.h> 00013 00014 #ifndef _SPHERICALKERNEL_H__ 00015 #define _SPHERICALKERNEL_H__ 00016 00017 #include <shogun/lib/common.h> 00018 #include <shogun/kernel/Kernel.h> 00019 #include <shogun/distance/Distance.h> 00020 00021 namespace shogun 00022 { 00023 00024 class CDistance; 00025 00038 class CSphericalKernel: public CKernel 00039 { 00040 public: 00042 CSphericalKernel(); 00043 00050 CSphericalKernel(int32_t size, float64_t sigma, CDistance* dist); 00051 00059 CSphericalKernel(CFeatures *l, CFeatures *r, float64_t sigma, CDistance* dist); 00060 00067 virtual bool init(CFeatures* l, CFeatures* r); 00068 00069 void init(); 00070 00074 inline virtual EKernelType get_kernel_type() { return K_SPHERICAL; } 00075 00079 inline virtual EFeatureType get_feature_type() { return distance->get_feature_type(); } 00080 00084 inline virtual EFeatureClass get_feature_class() { return distance->get_feature_class(); } 00085 00089 inline virtual const char* get_name() const { return "SphericalKernel"; } 00090 00095 inline virtual void set_sigma(float64_t s) 00096 { 00097 sigma=s; 00098 } 00099 00104 inline virtual float64_t get_sigma() const 00105 { 00106 return sigma; 00107 } 00108 00109 virtual ~CSphericalKernel(); 00110 protected: 00111 00113 CDistance* distance; 00114 00116 float64_t sigma; 00117 00127 virtual float64_t compute(int32_t idx_a, int32_t idx_b); 00128 }; 00129 } 00130 00131 #endif /* _SPHERICALKERNEL_H__ */