Date:         Sun, 19 Jan 1997 23:20:57 -0500
Reply-To:     tom <tjb@ACPUB.DUKE.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         tom <tjb@ACPUB.DUKE.EDU>
Organization: Duke University, Durham, NC, USA
Subject:      Re: [q] crossvalidation on logistic regression

In article <5bondg$f24$1@mark.ucdavis.edu>, szbchan@chip.ucdavis.edu
(Benjamin Chan) wrote:
> For observations in your validation sample, set a weight variable to 0.
> For observations in your testing sample, set the weight to 1.  Concatenate
> the two datasets and run PROC LOGISTIC with the WEIGHT statement.  The
> model fit will exclude validation records (since these are weight by 0).
> However, the OUTPUT statement calculates predicted values, xbetas, etc, on
> the entire dataset.
 
This worked. Cool. Thanks a lot.
 
Tom