RE: DM: Classification problem

 >From: "Yannis Kopanas" <ikopanas@ee.upatras.gr>
 >To: <datamine-l@nautilus-sys.com>
 >Subject: DM: Classification problem
 >Date: Thu, 25 May 2000 07:17:18 +0300
 >Reply-To: datamine-l@nautilus-sys.com
 >
 >
 >My problem has to do with the data set. I have two classes (the good guys
 >and the bad guys) unfortunatelly the bad guys are only 20 when the good guys
 >are 99980. Anybody who knows how to deal with it?
 >Thanks in advance.
 >     Yannis


Your case is very extreme. Usually, I'd suggest playing with the prior 
probabilities and misclassification costs. How important are those 20 "bad 
guys"?



--
T.S. Lim
tslim@recursive-partitioning.com
www.Recursive-Partitioning.com



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