ROC package in R

# plotting a ROC curve: library(ROCR) data(ROCR.simple) pred <- prediction( ROCR.simple$predictions, ROCR.simple$labels )   ## -- use slot to access the value -- threshold <- pred@cutoffs[[1]] tp <- pred@tp[[1]]   ## --- precision vs recall ---  precision <- performance( pred,  "prec") prec <- precision@y.values[[1]] recall <- performance( pred,  "rec") rec <- recall@y.values[[1]] plot(x=prec, y=rec)