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 * Copyright (C) 2011 Soeren Sonnenburg, Sergey Lisitsyn 00008 */ 00009 00010 #include <shogun/evaluation/MeanAbsoluteError.h> 00011 #include <shogun/features/Labels.h> 00012 #include <shogun/mathematics/Math.h> 00013 00014 using namespace shogun; 00015 00016 float64_t CMeanAbsoluteError::evaluate(CLabels* predicted, CLabels* ground_truth) 00017 { 00018 ASSERT(predicted->get_num_labels() == ground_truth->get_num_labels()); 00019 int32_t length = predicted->get_num_labels(); 00020 float64_t mae = 0.0; 00021 for (int32_t i=0; i<length; i++) 00022 mae += CMath::abs(predicted->get_label(i) - ground_truth->get_label(i)); 00023 mae /= length; 00024 return mae; 00025 }