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/DenseFeatures.h>
00020 #include <shogun/machine/LinearMachine.h>
00021 
00022 namespace shogun
00023 {
00024     template <class ST> class CDenseFeatures;
00052 class CLDA : public CLinearMachine
00053 {
00054     public:
00055         MACHINE_PROBLEM_TYPE(PT_BINARY);
00056 
00061         CLDA(float64_t gamma=0);
00062 
00069         CLDA(float64_t gamma, CDenseFeatures<float64_t>* traindat, CLabels* trainlab);
00070         virtual ~CLDA();
00071 
00076         inline void set_gamma(float64_t gamma)
00077         {
00078             m_gamma=gamma;
00079         }
00080 
00085         inline float64_t get_gamma()
00086         {
00087             return m_gamma;
00088         }
00089 
00094         virtual EMachineType get_classifier_type()
00095         {
00096             return CT_LDA;
00097         }
00098 
00103         virtual void set_features(CDotFeatures* feat)
00104         {
00105             if (feat->get_feature_class() != C_DENSE ||
00106                 feat->get_feature_type() != F_DREAL)
00107                 SG_ERROR("LDA requires SIMPLE REAL valued features\n");
00108 
00109             CLinearMachine::set_features(feat);
00110         }
00111 
00113         virtual const char* get_name() const { return "LDA"; }
00114 
00115     protected:
00124         virtual bool train_machine(CFeatures* data=NULL);
00125 
00126     protected:
00128         float64_t m_gamma;
00129 };
00130 }
00131 #endif
00132 #endif
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