Encyclopedia of Machine Learning

2010 Edition
| Editors: Claude Sammut, Geoffrey I. Webb

Area Under Curve

Reference work entry
DOI: https://doi.org/10.1007/978-0-387-30164-8_28




The area under curve (AUC) statistic is an empiricalmeasure of classification performance based on the area under an ROCcurve. It evaluates the performance of a scoring classifier on atest set, but ignores the magnitude of the scores and only takestheir rank order into account. AUC is expressed on a scale of 0 to1, where 0 means that all negatives are ranked before all positives,and 1 means that all positives are ranked before all negatives. See  ROC Analysis.

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