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 00022 class CHistogramWordStringKernel: public CStringKernel<uint16_t> 00023 { 00024 public: 00030 CHistogramWordStringKernel(int32_t size, CPluginEstimate* pie); 00031 00038 CHistogramWordStringKernel( 00039 CStringFeatures<uint16_t>* l, CStringFeatures<uint16_t>* r, 00040 CPluginEstimate* pie); 00041 00042 virtual ~CHistogramWordStringKernel(); 00043 00050 virtual bool init(CFeatures* l, CFeatures* r); 00051 00053 virtual void cleanup(); 00054 00060 bool load_init(FILE* src); 00061 00067 bool save_init(FILE* dest); 00068 00073 virtual EKernelType get_kernel_type() { return K_HISTOGRAM; } 00074 00079 virtual const char* get_name() const { return "Histogram" ; } 00080 00081 protected: 00090 float64_t compute(int32_t idx_a, int32_t idx_b); 00091 00098 inline int32_t compute_index(int32_t position, uint16_t symbol) 00099 { 00100 return position*num_symbols+symbol+1; 00101 } 00102 00103 protected: 00105 CPluginEstimate* estimate; 00106 00108 float64_t* mean; 00110 float64_t* variance; 00111 00113 float64_t* sqrtdiag_lhs; 00115 float64_t* sqrtdiag_rhs; 00116 00118 float64_t* ld_mean_lhs; 00120 float64_t* ld_mean_rhs; 00121 00123 float64_t* plo_lhs; 00125 float64_t* plo_rhs; 00126 00128 int32_t num_params; 00130 int32_t num_params2; 00132 int32_t num_symbols; 00134 float64_t sum_m2_s2; 00135 00137 bool initialized; 00138 }; 00139 00140 #endif /* _HISTOGRAMWORDKERNEL_H__ */