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prate
2011 Mar 13
1
use of ROCR package (ROC curve / AUC value) in a specific case versus integral calculation
...would like to use the ROCR package to draw ROC curves and compute AUC
values.
However, in the specific context of my application, the true positive
rates and false positive rates are already provided by some upstream method.
Of course, I can draw a ROC plot with the following command :
plot(x=FPrate, y=TPrate, "o", xlab="false positive rate", ylab="true
positive rate", xlim=c(0, 1), ylim=c(0, 1)
but this will bot compute the AUC value.
There are two possibilities :
Either it is possible to use the above parameters - FPrate and TPrate
vectors- to run the perfor...