Dear all, I am trying to analyze the perfromance of my classifier in r. However, I can not draw ROC curve for three classes. how can I draw ROC curve?

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William E. Winkler

ROC curves are for two classes.

If there are ten classes, then you successively compare one class with the other nine.

Necla Kayaalp Koçhan

Well, I found an application done for İris (including 3 classes) but I coud not understand what it does.

http://stats.stackexchange.com/questions/71700/how-to-draw-roc-curve-with-three-response-variable

I tried it to convert my data but it doesn't work :(