Is it possible to use ROCR to plot a simple recall at p plot? I.e., a plot where the x-axis is the position into the ranked test set, and the y-axis is the recall, so you can see what's the recall in the top 10% of the ranked results. I searched through the performance() manual but found nothing. (Not a cutoff-vs-recall graph, since the cutoff is the probability estimate returned by the model.) Thanks.