手法を比較

	マイクロ平均F1 (Micro-averaged F1)	加重F1スコア
分野	モデル評価	モデル評価
系統	MCDM	MCDM
提唱年	2000s	2000s
提唱者	Multi-class evaluation community	Multi-class evaluation community
種類	Evaluation metric	Evaluation metric
原典	Powers, D. M. (2011). Evaluation: From Precision, Recall and F-Measure to ROC, Informedness, Markedness and Correlation. Journal of Machine Learning Technologies, 2(1), 37-63.	Powers, D. M. (2011). Evaluation: From Precision, Recall and F-Measure to ROC, Informedness, Markedness and Correlation. Journal of Machine Learning Technologies, 2(1), 37-63.
別名	Micro F1, Frequency-weighted average F1	Support-weighted F1
関連	4	3
概要	Micro-averaged F1 computes the F1-score by aggregating true positives, false positives, and false negatives across all classes, then calculating a single metric. It is equivalent to accuracy in multi-class classification and is useful when class distributions reflect their natural importance.	Weighted F1 computes the F1-score for each class and then takes a weighted average, where weights are proportional to the number of samples in each class (support). It provides a middle ground between macro and micro-averaging.