Date:         Mon, 19 Oct 1998 12:10:09 -0500
Reply-To:     Cherilyn Young <cyoung@UTS.CC.UTEXAS.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         Cherilyn Young <cyoung@UTS.CC.UTEXAS.EDU>
Subject:      Classification lines in SAS?
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi everyone,
 
Is there a SAS function for drawing ideal classification lines (dividing
lines) between 2 groups of variables on a scatterplot?
 
I'm dealing with a scatterplot
situation (simple 2-var scatterplot), where each subject (data point) is
classified by one value each of 2 dichotomous variables.  I want to
find where the 2 classification lines are, which would divide the
scatterplot into 4 regions.
 
I've done the variables' coding and the plot
on Minitab already as a "late-night inspiration" estimate, but I need to
have the classification boundary lines drawn
in and figured out (like regression lines) instead of just estimating
them visually.  I'm not necessarily wanting the classification
boundary lines to go according to my original coding of the variables, but
how the stats work out (any differences between my coding and
statistical (mis-)categorization are welcome).
 
If SAS can't do it, does anyone know of any other software (psychometric,
epidemiological, etc.) that can do this?
 
Thank you in advance,
 
Cherilyn Young