Engineering Sandbox rollout ยท bundle-mounted ML essays
ROC and AUC are easiest to understand when the threshold movement, the scatter updates, and the curve all stay visible at the same time. This route keeps the sweep tactile and then uses the area view to summarize what the classifier family is doing.
Start with the threshold scene until the true-positive and false-positive tradeoff feels obvious, then move to the ROC and AUC sections to see how the whole sweep compresses into one curve and one summary score.