R error in calculating AUC value from pROC package

Question

I am trying to use the pROC package in R to calculate sensitivity, specificity and threshold level. Here is a sample data

library(pROC)
x<-sample(0:1,7974,replace=T)
y<-sample(0:16049.2,7974,replace=T)
myroc<-roc(x,y)
coords(myroc, "best", ret=c("threshold", "sensitivity", "specificity"))

Error in UseMethod("coords") : 
 no applicable method for 'coords' applied to an object of class "c('double', 'numeric')"

Will anyone be able to tell me why this error is happening and how to fix it?

Thank you

I was able to copy and paste your code and it worked fine. I'm in R 3.2.4 — Tchotchke, May 04 '16 at 15:21
can you print out your sessionInfo() and update your question ? — eliasah, May 04 '16 at 15:26
Thanks for your comment. I got it working. There was something wrong with R. I had to restart it and it started working. — user53020, May 04 '16 at 15:51

score 0 · Accepted Answer · edited May 23 '17 at 10:32

Here is my best guess: the roc function name is used in several packages (11 on CRAN at the moment according to the sos package) and those will take precedence over pROC if they are loaded later in your session. By restarting R you cleared that function from your search path and are back to using pROC's roc.

To ensure you are using pROC's roc function, use the following syntax:

myroc<-pROC::roc(x,y)

R error in calculating AUC value from pROC package

1 Answers1