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 _SPARSELINEARKERNEL_H___ 00012 #define _SPARSELINEARKERNEL_H___ 00013 00014 #include "lib/common.h" 00015 #include "kernel/SparseKernel.h" 00016 #include "features/SparseFeatures.h" 00017 00024 class CSparseLinearKernel: public CSparseKernel<float64_t> 00025 { 00026 public: 00029 CSparseLinearKernel(); 00030 00036 CSparseLinearKernel( 00037 CSparseFeatures<float64_t>* l, CSparseFeatures<float64_t>* r); 00038 00039 virtual ~CSparseLinearKernel(); 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_SPARSELINEAR; } 00071 00076 virtual const char* get_name() { return "SparseLinear" ; } 00077 00086 virtual bool init_optimization(int32_t num_suppvec, int32_t* sv_idx, 00087 float64_t* alphas); 00088 00093 virtual bool delete_optimization(); 00094 00100 virtual float64_t compute_optimized(int32_t idx); 00101 00103 virtual void clear_normal(); 00104 00110 virtual void add_to_normal(int32_t idx, float64_t weight); 00111 00117 inline const float64_t* get_normal(int32_t& len) 00118 { 00119 len=normal_length; 00120 return normal; 00121 } 00122 00123 protected: 00132 virtual float64_t compute(int32_t idx_a, int32_t idx_b); 00133 00134 protected: 00136 float64_t* normal; 00138 int32_t normal_length; 00139 }; 00140 00141 #endif /* _SPARSELINEARKERNEL_H__ */