Date:         Wed, 6 Jun 2001 06:12:36 CDT
Reply-To:     Jeffrey Berman <jberman@MEMPHIS.EDU>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Jeffrey Berman <jberman@MEMPHIS.EDU>
Subject:      Re: Computing Mean-Centered Values w/Syntax
Comments: To: cecarroll@MAIL.UTEXAS.EDU

On Tue, 5 Jun 2001, Craig E Carroll <cecarroll@MAIL.UTEXAS.EDU> wrote:

> Does anyone know how to create mean-centered values for variables using
> syntax?

Craig:

Here is SPSS syntax for creating a mean-centered transformation of a variable:

COMPUTE        DUMMY=1.

AGGREGATE      OUTFILE='mean.tmp'
               /BREAK=DUMMY
               /MEANVAR=MEAN(ORIGVAR).

MATCH FILES     FILE=*
               /TABLE='mean.tmp'
               /BY DUMMY.

COMPUTE        CENTVAR=ORIGVAR-MEANVAR.

DUMMY is a variable that will the same value (1) for all cases, MEANVAR is a
variable that has the mean of the ORIGVAR variable for all cases, and
CENTVAR is the mean-centered transformation.

-Jeffrey Berman
 University of Memphis