The area under the ROC curve (AUROC), calculated using the Mann-Whitney U-test. The curve is constructed by shifting the threshold for a positive prediction from 0 to 1, yielding a series of true positive rates (TPR) and false positive rates (FPR), from which a step-wise ROC curve can be constructed. See Note that this is different from the Area Under the ROC Convex Hull (ROC AUCH). AUROC is defined only for a specific class value, and should thus be labeled with the class value for which is was computed. Use the mean_weighted_area_under_roc_curve for the weighted average over all class values.

Source Code:
See WEKA's ThresholdCurve class.


Minimum value0
Maximum value1
OptimizationHigher is better