SHOGUN
v1.1.0
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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 #include <shogun/machine/LinearMachine.h> 00012 #include <shogun/base/Parameter.h> 00013 00014 using namespace shogun; 00015 00016 CLinearMachine::CLinearMachine() 00017 : CMachine(), w_dim(0), w(NULL), bias(0), features(NULL) 00018 { 00019 00020 m_parameters->add_vector(&w, &w_dim, "w", "Parameter vector w."); 00021 m_parameters->add(&bias, "bias", "Bias b."); 00022 m_parameters->add((CSGObject**) &features, "features", "Feature object."); 00023 00024 } 00025 00026 CLinearMachine::~CLinearMachine() 00027 { 00028 SG_FREE(w); 00029 SG_UNREF(features); 00030 } 00031 00032 bool CLinearMachine::load(FILE* srcfile) 00033 { 00034 SG_SET_LOCALE_C; 00035 SG_RESET_LOCALE; 00036 return false; 00037 } 00038 00039 bool CLinearMachine::save(FILE* dstfile) 00040 { 00041 SG_SET_LOCALE_C; 00042 SG_RESET_LOCALE; 00043 return false; 00044 } 00045 00046 CLabels* CLinearMachine::apply() 00047 { 00048 if (!features) 00049 return NULL; 00050 00051 int32_t num=features->get_num_vectors(); 00052 ASSERT(num>0); 00053 ASSERT(w_dim==features->get_dim_feature_space()); 00054 00055 float64_t* out=SG_MALLOC(float64_t, num); 00056 features->dense_dot_range(out, 0, num, NULL, w, w_dim, bias); 00057 00058 return new CLabels(SGVector<float64_t>(out,num)); 00059 } 00060 00061 CLabels* CLinearMachine::apply(CFeatures* data) 00062 { 00063 if (!data) 00064 SG_ERROR("No features specified\n"); 00065 if (!data->has_property(FP_DOT)) 00066 SG_ERROR("Specified features are not of type CDotFeatures\n"); 00067 set_features((CDotFeatures*) data); 00068 return apply(); 00069 }