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) 2007-2008 Soeren Sonnenburg 00008 * Copyright (C) 2007-2008 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #ifndef _SPARSEEUCLIDIANDISTANCE_H__ 00012 #define _SPARSEEUCLIDIANDISTANCE_H__ 00013 00014 #include "lib/common.h" 00015 #include "distance/SparseDistance.h" 00016 #include "features/SparseFeatures.h" 00017 00019 class CSparseEuclidianDistance: public CSparseDistance<DREAL> 00020 { 00021 public: 00023 CSparseEuclidianDistance(); 00024 00030 CSparseEuclidianDistance(CSparseFeatures<DREAL>* l, CSparseFeatures<DREAL>* r); 00031 virtual ~CSparseEuclidianDistance(); 00032 00039 virtual bool init(CFeatures* l, CFeatures* r); 00040 00042 virtual void cleanup(); 00043 00049 virtual bool load_init(FILE* src); 00050 00056 virtual bool save_init(FILE* dest); 00057 00062 virtual EDistanceType get_distance_type() { return D_SPARSEEUCLIDIAN; } 00063 00068 inline virtual EFeatureType get_feature_type() { return F_DREAL; } 00069 00074 virtual const CHAR* get_name() { return "SparseEuclidian" ; } ; 00075 00076 protected: 00080 virtual DREAL compute(INT idx_a, INT idx_b); 00081 /* compute_kernel*/ 00082 00083 protected: 00085 double scale; 00086 00088 DREAL* sq_lhs; 00090 DREAL* sq_rhs; 00091 00092 }; 00093 00094 #endif /* _SPARSEEUCLIDIANDISTANCE_H__ */