CosineDistance.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) 2008-2009 Christian Gehl
00008  * Copyright (C) 2008-2009 Fraunhofer Institute FIRST
00009  */
00010 
00011 #ifndef _COSINEDISTANCE_H___
00012 #define _COSINEDISTANCE_H___
00013 
00014 #include "lib/common.h"
00015 #include "distance/SimpleDistance.h"
00016 #include "features/SimpleFeatures.h"
00017 
00018 namespace shogun
00019 {
00036 class CCosineDistance: public CSimpleDistance<float64_t>
00037 {
00038     public:
00040         CCosineDistance();
00041 
00047         CCosineDistance(CSimpleFeatures<float64_t>* l, CSimpleFeatures<float64_t>* r);
00048         virtual ~CCosineDistance();
00049 
00056         virtual bool init(CFeatures* l, CFeatures* r);
00057 
00059         virtual void cleanup();
00060 
00065         virtual EDistanceType get_distance_type() { return D_COSINE; }
00066 
00071         virtual const char* get_name() const { return "CosineDistance"; }
00072 
00073     protected:
00077         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00078 };
00079 
00080 } // namespace shogun
00081 #endif /* _COSINEDISTANCE_H___ */
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