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Receiver Operating Characteristic, also known as the ROC curve, is a graphical plot that illustrates the diagnostic ability of a binary classifier system at different thresholds

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A strange ROC curve [duplicate]

I produced the ROC curve for a continuous biomarker used as a classifier toward a binary class (absence/presence of a disease according to another biomarker), using the ROCR package in R. … First, the curve plateaus earlier than, let's say the honest thing, the ROC curves you see in books. …
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