AUACC vs AUROC curves

When you want to give equal weight to both 1's and 0's, which curve is better AUROC or AUACC? It wasn't clear to me from the video.

Answers and follow-up questions

Answer or follow-up question 1

Dear student,

First, some notation. AUROC stands for Area Under the Receiver Operating Characteristic (curve), and AUACC stands for the Area Under the
Accuracy Curve. When you want to refer to their respective curves, you would say ROC curve and Accuracy curve.

As to your question: you want to use the AUROC if you want to weigh both 1s and 0s equally. You could also do the balanced accuracy curve,
but I haven't covered that in the book or video. The equations are detailed in Table 2.9.

Michel Ballings

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