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 * (W) 2012 Jacob Walker 00008 * 00009 * Adapted from WeightedDegreeRBFKernel.h 00010 * 00011 */ 00012 00013 #ifndef LINEARARDKERNEL_H_ 00014 #define LINEARARDKERNEL_H_ 00015 00016 #include <shogun/lib/common.h> 00017 #include <shogun/kernel/DotKernel.h> 00018 #include <shogun/features/DenseFeatures.h> 00019 00020 namespace shogun 00021 { 00022 00026 class CLinearARDKernel: public CDotKernel 00027 { 00028 00029 public: 00033 CLinearARDKernel(); 00034 00039 CLinearARDKernel(int32_t size); 00040 00047 CLinearARDKernel(CDenseFeatures<float64_t>* l, CDenseFeatures<float64_t>* r, 00048 int32_t size=10); 00049 00050 virtual ~CLinearARDKernel(); 00051 00058 virtual bool init(CFeatures* l, CFeatures* r); 00059 00064 virtual EKernelType get_kernel_type() { return K_LINEARARD; } 00065 00070 virtual const char* get_name() const { return "LinearARDKernel"; } 00071 00072 00077 virtual EFeatureClass get_feature_class() { return C_DENSE; } 00078 00083 virtual EFeatureType get_feature_type() { return F_DREAL; } 00084 00090 virtual void set_weight(float64_t w, index_t i); 00091 00098 virtual float64_t get_weight(index_t i); 00099 00100 protected: 00101 00110 virtual float64_t compute(int32_t idx_a, int32_t idx_b); 00111 00116 void init_ft_weights(); 00117 00126 virtual SGMatrix<float64_t> get_parameter_gradient(TParameter* param, 00127 CSGObject* obj, index_t index); 00128 00129 private: 00130 00131 void init(); 00132 00133 protected: 00134 00136 SGVector<float64_t> m_weights; 00137 }; 00138 00139 } /* namespace shogun */ 00140 #endif /* LINEARARDKERNEL_H_ */