ROC curve a Discrete classifier produces an(FPR, TPR) pair corresponding to a single point in ROC space a Some classifier, such as a naive bayes or a neural network, naturally yield an instance probability or score, a numeric value that represents the degree to which an instance is a member of a class a Such a ranking or scoring classifier can be used with a threshold to produce a discrete classifier a Plotting the Roc point for each possible threshold value results in a curveROC curve ◼ A discrete classifier produces an (FPR, TPR) pair corresponding to a single point in ROC space. ◼ Some classifier, such as a Naïve Bayes or a neural network, naturally yield an instance probability or score, a numeric value that represents the degree to which an instance is a member of a class. ◼ Such a ranking or scoring classifier can be used with a threshold to produce a discrete classifier ◼ Plotting the ROC point for each possible threshold value results in a curve