Displaying 1 result from an estimated 1 matches for "pf2_roc".
2011 Sep 03
2
ROCR package question for evaluating two regression models
...used ROCR package to compare them:pr1 = prediction(pred1,test.y)pf1 = performance(pr1, measure = "prec", x.measure = "rec") plot(pf1) which cutoff this plot is based on?
pr2 = prediction(pred2,test.y)pf2 = performance(pr2, measure = "prec", x.measure = "rec")pf2_roc = performance(pr2,measure="err")plot(pf2)
First of all, I would like to use cutoff = 0.5 and plot the ROC, precision-recall curves based on that cutoff value. In other words, how to define a cut off value in performance function?For example, in pf2_roc = performance(pr2,measure="er...