SHOGUN
v3.2.0
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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 _WEIGHTEDCOMMWORDSTRINGKERNEL_H___ 00013 #define _WEIGHTEDCOMMWORDSTRINGKERNEL_H___ 00014 00015 #include <shogun/lib/common.h> 00016 #include <shogun/mathematics/Math.h> 00017 #include <shogun/kernel/string/CommWordStringKernel.h> 00018 00019 namespace shogun 00020 { 00021 class CCommWordStringKernel; 00022 00050 class CWeightedCommWordStringKernel: public CCommWordStringKernel 00051 { 00052 public: 00054 CWeightedCommWordStringKernel(); 00055 00061 CWeightedCommWordStringKernel(int32_t size, bool use_sign); 00062 00070 CWeightedCommWordStringKernel( 00071 CStringFeatures<uint16_t>* l, CStringFeatures<uint16_t>* r, 00072 bool use_sign=false, int32_t size=10); 00073 00074 virtual ~CWeightedCommWordStringKernel(); 00075 00082 virtual bool init(CFeatures* l, CFeatures* r); 00083 00085 virtual void cleanup(); 00086 00092 virtual float64_t compute_optimized(int32_t idx); 00093 00099 virtual void add_to_normal(int32_t idx, float64_t weight); 00100 00102 void merge_normal(); 00103 00108 bool set_wd_weights(); 00109 00115 bool set_weights(SGVector<float64_t> weights); 00116 00121 virtual EKernelType get_kernel_type() { return K_WEIGHTEDCOMMWORDSTRING; } 00122 00127 virtual const char* get_name() const { return "WeightedCommWordStringKernel"; } 00128 00133 virtual EFeatureType get_feature_type() { return F_WORD; } 00134 00147 virtual float64_t* compute_scoring( 00148 int32_t max_degree, int32_t& num_feat, int32_t& num_sym, 00149 float64_t* target, int32_t num_suppvec, int32_t* IDX, 00150 float64_t* alphas, bool do_init=true); 00151 00152 protected: 00159 virtual float64_t compute_helper( 00160 int32_t idx_a, int32_t idx_b, bool do_sort); 00161 00162 private: 00163 void init(); 00164 00165 protected: 00167 int32_t degree; 00168 00170 float64_t* weights; 00171 }; 00172 } 00173 #endif /* _WEIGHTEDCOMMWORDSTRINGKERNEL_H__ */