I am not sure whether I am being correct here but I think you can manually create the ROC chart by calculating the number of correct hits against the misclassified.
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From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Peter Flom
Sent: Wednesday, January 14, 2009 10:08 PM
Subject: Graphical summaries of 3 level discriminants
Apologies for cross posting, but both these groups are full of smart and helpful people ....
In a normal discriminant analysis, a very common graphical summary is an ROC curve, plotting 1-specificity against sensitivity. I am now working with a 3 way discriminant (that is, the dependent variable has 3 levels). I was wondering if anyone had come across any graphical summaries of such models.
TIA as always
Peter L. Flom, PhD
www DOT peterflom DOT com