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
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