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Date:   Wed, 14 Jan 2009 22:18:45 +0800
Reply-To:   Murphy <goladin@GMAIL.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   Murphy <goladin@GMAIL.COM>
Subject:   Re: Graphical summaries of 3 level discriminants
Comments:   To: Peter Flom <peterflomconsulting@mindspring.com>
In-Reply-To:   <6489997.1231942057683.JavaMail.root@mswamui-backed.atl.sa.earthlink.net>
Content-Type:   text/plain; charset="UTF-8"

Hi Peter,

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.

Regards, Murphy Choy Certified Base SAS Programmer for SAS V9 Certified Advanced SAS Programmer for SAS V9 Datashaping Certified SAS Professional

-----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Peter Flom Sent: Wednesday, January 14, 2009 10:08 PM To: SAS-L@LISTSERV.UGA.EDU Subject: Graphical summaries of 3 level discriminants

Hi all

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

Peter L. Flom, PhD Statistical Consultant www DOT peterflom DOT com

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