SparseEuclideanDistance.h

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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) 2007-2009 Soeren Sonnenburg
00008  * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _SPARSEEUCLIDEANDISTANCE_H__
00012 #define _SPARSEEUCLIDEANDISTANCE_H__
00013 
00014 #include <shogun/lib/common.h>
00015 #include <shogun/distance/SparseDistance.h>
00016 #include <shogun/features/SparseFeatures.h>
00017 
00018 namespace shogun
00019 {
00020     template <class T> class CSparseFeatures;
00022 class CSparseEuclideanDistance: public CSparseDistance<float64_t>
00023 {
00024     public:
00026         CSparseEuclideanDistance();
00027 
00033         CSparseEuclideanDistance(
00034             CSparseFeatures<float64_t>* l, CSparseFeatures<float64_t>* r);
00035         virtual ~CSparseEuclideanDistance();
00036 
00043         virtual bool init(CFeatures* l, CFeatures* r);
00044 
00046         virtual void cleanup();
00047 
00052         virtual EDistanceType get_distance_type() { return D_SPARSEEUCLIDEAN; }
00053 
00058         virtual EFeatureType get_feature_type() { return F_DREAL; }
00059 
00064         virtual const char* get_name() const { return "SparseEuclideanDistance"; }
00065 
00066     protected:
00070         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00071         /*    compute_kernel*/
00072 
00073     private:
00074         void init();
00075 
00076     protected:
00078         float64_t* sq_lhs;
00080         float64_t* sq_rhs;
00081 
00082 };
00083 
00084 } // namespace shogun
00085 #endif /* _SPARSEEUCLIDEANDISTANCE_H__ */
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