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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 }