SHOGUN
v3.2.0
|
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) 2012 Jacob Walker 00008 * 00009 * Adapted from WeightedDegreeRBFKernel.h 00010 */ 00011 00012 #ifndef GAUSSIANARDKERNEL_H_ 00013 #define GAUSSIANARDKERNEL_H_ 00014 00015 #include <shogun/lib/common.h> 00016 #include <shogun/kernel/DotKernel.h> 00017 #include <shogun/features/DenseFeatures.h> 00018 #include <shogun/kernel/LinearARDKernel.h> 00019 00020 namespace shogun 00021 { 00022 00024 class CGaussianARDKernel: public CLinearARDKernel 00025 { 00026 public: 00028 CGaussianARDKernel(); 00029 00035 CGaussianARDKernel(int32_t size, float64_t width); 00036 00044 CGaussianARDKernel(CDenseFeatures<float64_t>* l, CDenseFeatures<float64_t>* r, 00045 int32_t size=10, float64_t width=2.0); 00046 00048 virtual ~CGaussianARDKernel(); 00049 00054 static CGaussianARDKernel* obtain_from_generic(CKernel* kernel); 00055 00062 virtual bool init(CFeatures* l, CFeatures* r); 00063 00068 virtual EKernelType get_kernel_type() { return K_GAUSSIANARD; } 00069 00074 virtual const char* get_name() const { return "GaussianARDKernel"; } 00075 00083 virtual SGMatrix<float64_t> get_parameter_gradient(const TParameter* param, 00084 index_t index=-1); 00085 00086 protected: 00095 virtual float64_t compute(int32_t idx_a, int32_t idx_b); 00096 00097 private: 00098 void init(); 00099 00100 protected: 00102 float64_t m_width; 00103 }; 00104 } 00105 #endif /* GAUSSIANARDKERNEL_H_ */