ROC curve
Question
As we know, a ROC curve is plotted between TPR and FPR but to plot any curve we need different values of x and y. How do we get different TPR and FPR values for the plot?
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Answer ( 1 )
We change the threshold values for classification to get different TPR and FPR values. If the threshold is 0.5, then the probability > 0.5 is considered as class 1 and the probability < 0.5 is considered as class 0. We can set different threshold values to get different results.