ROCR crashes for simple recall plot

I'm trying to use ROCR to create a simple cutoff vs recall plot
(recall at p) on the example ROCR.simple dataset:

library(ROCR)
data(ROCR.simple)
pred <- prediction(ROCR.simple$predictions, ROCR.simple$labels)
perf <- performance(pred, "rec")
plot(perf)

But R crashes on me on the last line.
Define "crash". please (...as well as answering the sessionInfor()  
request.)
I'm using R 2.14.1, ROCR 1.0-4.  Any ideas?  Thanks in advance.

-- 
Yang Zhang
http://yz.mit.edu/

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT

ROCR crashes for simple recall plot

Thread (4 messages)