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 <shogun/lib/config.h>
00015 
00016 #ifdef HAVE_LAPACK
00017 #include <shogun/lib/common.h>
00018 #include <shogun/features/Features.h>
00019 #include <shogun/features/SimpleFeatures.h>
00020 #include <shogun/machine/LinearMachine.h>
00021 
00022 namespace shogun
00023 {
00024     template <class ST> class CSimpleFeatures;
00052 class CLDA : public CLinearMachine
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 
00092         inline virtual EClassifierType get_classifier_type()
00093         {
00094             return CT_LDA;
00095         }
00096 
00101         virtual inline void set_features(CDotFeatures* feat)
00102         {
00103             if (feat->get_feature_class() != C_SIMPLE ||
00104                 feat->get_feature_type() != F_DREAL)
00105                 SG_ERROR("LDA requires SIMPLE REAL valued features\n");
00106 
00107             CLinearMachine::set_features(feat);
00108         }
00109 
00111         inline virtual const char* get_name() const { return "LDA"; }
00112 
00113     protected:
00122         virtual bool train_machine(CFeatures* data=NULL);
00123 
00124     protected:
00126         float64_t m_gamma;
00127 };
00128 }
00129 #endif
00130 #endif
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