LPBoost.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) 2007-2009 Soeren Sonnenburg
00008  * Copyright (C) 2007-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _LPBOOST_H___
00012 #define _LPBOOST_H___
00013 
00014 #include "lib/config.h"
00015 #ifdef USE_CPLEX
00016 
00017 #include <stdio.h>
00018 #include "lib/common.h"
00019 #include "lib/DynamicArray.h"
00020 
00021 #include "features/Features.h"
00022 #include "features/SparseFeatures.h"
00023 #include "classifier/LinearClassifier.h"
00024 
00046 class CLPBoost : public CLinearClassifier
00047 {
00048     public:
00049         CLPBoost();
00050         virtual ~CLPBoost();
00051 
00052         virtual bool train();
00053 
00054         inline virtual EClassifierType get_classifier_type()
00055         {
00056             return CT_LPBOOST;
00057         }
00058 
00059         bool init(int32_t num_vec);
00060         void cleanup();
00061 
00066         virtual inline void set_features(CDotFeatures* feat)
00067         {
00068             if (feat->get_feature_class() != C_SPARSE ||
00069                 feat->get_feature_type() != F_DREAL)
00070                 SG_ERROR("LPBoost requires SPARSE REAL valued features\n");
00071 
00072             CLinearClassifier::set_features(feat);
00073         }
00074 
00075         inline void set_C(float64_t c1, float64_t c2) { C1=c1; C2=c2; }
00076 
00077         inline float64_t get_C1() { return C1; }
00078         inline float64_t get_C2() { return C2; }
00079 
00080         inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00081         inline bool get_bias_enabled() { return use_bias; }
00082 
00083         inline void set_epsilon(float64_t eps) { epsilon=eps; }
00084         inline float64_t get_epsilon() { return epsilon; }
00085 
00086         float64_t find_max_violator(int32_t& max_dim);
00087 
00089         inline virtual const char* get_name() const { return "LPBoost"; }
00090 
00091     protected:
00092         float64_t C1;
00093         float64_t C2;
00094         bool use_bias;
00095         float64_t epsilon;
00096 
00097         float64_t* u;
00098         CDynamicArray<int32_t>* dim;
00099 
00100         int32_t num_sfeat;
00101         int32_t num_svec;
00102         TSparse<float64_t>* sfeat;
00103 
00104 };
00105 #endif //USE_CPLEX
00106 #endif //_LPBOOST_H___

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