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 
00025 namespace shogun
00026 {
00048 #define IGNORE_IN_CLASSLIST
00049 IGNORE_IN_CLASSLIST class CLPBoost : public CLinearClassifier
00050 {
00051     public:
00052         CLPBoost();
00053         virtual ~CLPBoost();
00054 
00063         virtual bool train(CFeatures* data=NULL);
00064 
00065         inline virtual EClassifierType get_classifier_type()
00066         {
00067             return CT_LPBOOST;
00068         }
00069 
00070         bool init(int32_t num_vec);
00071         void cleanup();
00072 
00077         virtual inline void set_features(CDotFeatures* feat)
00078         {
00079             if (feat->get_feature_class() != C_SPARSE ||
00080                 feat->get_feature_type() != F_DREAL)
00081                 SG_ERROR("LPBoost requires SPARSE REAL valued features\n");
00082 
00083             CLinearClassifier::set_features(feat);
00084         }
00085 
00092         inline void set_C(float64_t c_neg, float64_t c_pos) { C1=c_neg; C2=c_pos; }
00093 
00094         inline float64_t get_C1() { return C1; }
00095         inline float64_t get_C2() { return C2; }
00096 
00097         inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00098         inline bool get_bias_enabled() { return use_bias; }
00099 
00100         inline void set_epsilon(float64_t eps) { epsilon=eps; }
00101         inline float64_t get_epsilon() { return epsilon; }
00102 
00103         float64_t find_max_violator(int32_t& max_dim);
00104 
00106         inline virtual const char* get_name() const { return "LPBoost"; }
00107 
00108     protected:
00109         float64_t C1;
00110         float64_t C2;
00111         bool use_bias;
00112         float64_t epsilon;
00113 
00114         float64_t* u;
00115         CDynamicArray<int32_t>* dim;
00116 
00117         int32_t num_sfeat;
00118         int32_t num_svec;
00119         TSparse<float64_t>* sfeat;
00120 
00121 };
00122 }
00123 #endif //USE_CPLEX
00124 #endif //_LPBOOST_H___
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