Hi list,
I'm new to R and I'm currently using ROCR package.
Data in input look like this:
DIAGNOSIS SCORE
1 0.387945
1 0.50405
1 0.435667
1 0.358057
1 0.583512
1 0.387945
1 0.531795
1 0.527148
0 0.526397
0 0.372935
1 0.861097
And I run the following simple code:
d <- read.table("inputFile", header=TRUE);
pred <- prediction(d$SCORE, d$DIAGNOSIS);
perf <- performance( pred, "tpr", "fpr");
plot(perf)
So building the curve works easily.
My question is: can I have the specificity and the sensitivity for
a score threshold = 0.5 (for example)? How do I compute this ?
Thank you in advance
--
View this message in context:
http://www.nabble.com/Calculate-Specificity-and-Sensitivity-for-a-given-threshold-value-tp20481633p20481633.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
[email protected] 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.
