LibLinear.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 _LIBLINEAR_H___
00012 #define _LIBLINEAR_H___
00013 
00014 #include "lib/config.h"
00015 
00016 #ifdef HAVE_LAPACK
00017 #include "lib/common.h"
00018 #include "classifier/LinearClassifier.h"
00019 
00020 namespace shogun
00021 {
00022 enum LIBLINEAR_LOSS
00023 {
00024     LR = 0,
00025     L2 = 1
00026 };
00027 
00029 class CLibLinear : public CLinearClassifier
00030 {
00031     public:
00036         CLibLinear(LIBLINEAR_LOSS loss);
00037 
00044         CLibLinear(
00045             float64_t C, CDotFeatures* traindat,
00046             CLabels* trainlab);
00047 
00048         virtual ~CLibLinear();
00049 
00058         virtual bool train(CFeatures* data=NULL);
00059 
00064         virtual inline EClassifierType get_classifier_type() { return CT_LIBLINEAR; }
00065 
00071         inline void set_C(float64_t c1, float64_t c2) { C1=c1; C2=c2; }
00072 
00077         inline float64_t get_C1() { return C1; }
00078 
00083         inline float64_t get_C2() { return C2; }
00084 
00089         inline void set_epsilon(float64_t eps) { epsilon=eps; }
00090 
00095         inline float64_t get_epsilon() { return epsilon; }
00096 
00101         inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00102 
00107         inline bool get_bias_enabled() { return use_bias; }
00108 
00110         inline virtual const char* get_name() const { return "LibLinear"; }
00111 
00112     protected:
00114         float64_t C1;
00116         float64_t C2;
00118         bool use_bias;
00120         float64_t epsilon;
00121 
00123         LIBLINEAR_LOSS loss;
00124 };
00125 }
00126 #endif //HAVE_LAPACK
00127 #endif //_LIBLINEAR_H___

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