LDA.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) 1999-2009 Soeren Sonnenburg
00008  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _LDA_H___
00012 #define _LDA_H___
00013 
00014 #include "lib/config.h"
00015 
00016 #ifdef HAVE_LAPACK
00017 #include "lib/common.h"
00018 #include "features/Features.h"
00019 #include "features/SimpleFeatures.h"
00020 #include "classifier/LinearClassifier.h"
00021 
00022 namespace shogun
00023 {
00024     template <class ST> class CSimpleFeatures;
00052 class CLDA : public CLinearClassifier
00053 {
00054     public:
00059         CLDA(float64_t gamma=0);
00060 
00067         CLDA(float64_t gamma, CSimpleFeatures<float64_t>* traindat, CLabels* trainlab);
00068         virtual ~CLDA();
00069 
00074         inline void set_gamma(float64_t gamma)
00075         {
00076             m_gamma=gamma;
00077         }
00078 
00083         inline float64_t get_gamma()
00084         {
00085             return m_gamma;
00086         }
00087 
00096         virtual bool train(CFeatures* data=NULL);
00097 
00102         inline virtual EClassifierType get_classifier_type()
00103         {
00104             return CT_LDA;
00105         }
00106 
00111         virtual inline void set_features(CDotFeatures* feat)
00112         {
00113             if (feat->get_feature_class() != C_SIMPLE ||
00114                 feat->get_feature_type() != F_DREAL)
00115                 SG_ERROR("LDA requires SIMPLE REAL valued features\n");
00116 
00117             CLinearClassifier::set_features(feat);
00118         }
00119 
00121         inline virtual const char* get_name() const { return "LDA"; }
00122 
00123     protected:
00125         float64_t m_gamma;
00126 };
00127 }
00128 #endif
00129 #endif
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