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) 1999-2009 Soeren Sonnenburg 00008 * Written (W) 1999-2008 Gunnar Raetsch 00009 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society 00010 */ 00011 00012 #ifndef _HISTOGRAMWORDKERNEL_H___ 00013 #define _HISTOGRAMWORDKERNEL_H___ 00014 00015 #include "lib/common.h" 00016 #include "kernel/StringKernel.h" 00017 #include "classifier/PluginEstimate.h" 00018 #include "features/StringFeatures.h" 00019 00020 namespace shogun 00021 { 00022 class CPluginEstimate; 00023 template <class T> class CStringFeatures; 00026 class CHistogramWordStringKernel: public CStringKernel<uint16_t> 00027 { 00028 public: 00030 CHistogramWordStringKernel(); 00031 00037 CHistogramWordStringKernel(int32_t size, CPluginEstimate* pie); 00038 00045 CHistogramWordStringKernel( 00046 CStringFeatures<uint16_t>* l, CStringFeatures<uint16_t>* r, 00047 CPluginEstimate* pie); 00048 00049 virtual ~CHistogramWordStringKernel(); 00050 00057 virtual bool init(CFeatures* l, CFeatures* r); 00058 00060 virtual void cleanup(); 00061 00066 virtual EKernelType get_kernel_type() { return K_HISTOGRAM; } 00067 00072 virtual const char* get_name() const { return "Histogram" ; } 00073 00074 protected: 00083 float64_t compute(int32_t idx_a, int32_t idx_b); 00084 00091 inline int32_t compute_index(int32_t position, uint16_t symbol) 00092 { 00093 return position*num_symbols+symbol+1; 00094 } 00095 00096 private: 00097 void init(); 00098 00099 protected: 00101 CPluginEstimate* estimate; 00102 00104 float64_t* mean; 00106 float64_t* variance; 00107 00109 float64_t* sqrtdiag_lhs; 00111 float64_t* sqrtdiag_rhs; 00112 00114 float64_t* ld_mean_lhs; 00116 float64_t* ld_mean_rhs; 00117 00119 float64_t* plo_lhs; 00121 float64_t* plo_rhs; 00122 00124 int32_t num_params; 00126 int32_t num_params2; 00128 int32_t num_symbols; 00130 float64_t sum_m2_s2; 00131 00133 bool initialized; 00134 }; 00135 } 00136 #endif /* _HISTOGRAMWORDKERNEL_H__ */