手法を比較

	適合率-再現率AUC	精度（Precision）
分野	モデル評価	モデル評価
系統	MCDM	MCDM
提唱年	2006	20th century
提唱者	Davis and Goadrich	Historical statistical foundations
種類	Evaluation metric	Evaluation metric
原典	Davis, J., & Goadrich, M. (2006). The relationship between precision-recall and ROC curves. Proceedings of the 23rd International Conference on Machine Learning, 233-240.	Fawcett, T. (2006). An introduction to ROC analysis. Pattern Recognition Letters, 27(8), 861-874.
別名	PR AUC, PR Curve	Positive Predictive Value, PPV
関連	4	5
概要	The Precision-Recall Area Under the Curve (PR AUC) is the area under the curve formed by plotting recall on the x-axis and precision on the y-axis. It is particularly useful for evaluating classifiers on imbalanced datasets, where it is often more informative than ROC AUC.	Precision measures the proportion of positive predictions that were actually correct. It answers the question: 'Of all the cases we predicted as positive, how many were truly positive?' Precision is critical in scenarios where false positives are costly.