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Re: st: including all interactions among a set of variables


From   "Christopher W. Ryan" <cryan@binghamton.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: including all interactions among a set of variables
Date   Fri, 14 Feb 2003 10:55:48 -0500

Are your dependent variables continuous our categorical?

I'm certainly no expert at this Stata stuff yet, but I have been running some 
multiple linear regression models with categorical variables, and I have gotten 
interactions  by using

xi:regress depvar i.var1*i.var2

It looks like this gave me regression coefficients for var 1, var 2, and 
var1*var2
-- 
Christopher W. Ryan, MD
SUNY Upstate Medical University Clinical Campus at Binghamton
and Wilson Family Practice Residency
40 Arch Street, Johnson City, NY  13790
cryan@binghamton.edu
Public key generated with PGP 602i available at 
http://home.stny.rr.com/ryancw/PGP602ipublickey.html
or via http://wwwkeys.us.pgp.net:11371

"If you want to build a ship, don't drum up the men to gather wood, divide the 
work and give orders. Instead, teach them to yearn for the vast and endless 
sea."  [Antoine de St. Exupery]


On Fri, 14 Feb 2003 05:57:41 -0500, david huffer wrote:
>Is there a command used to include every 2-way interaction among a
>set
>of variables in a regression-type model?  In SAS it is accomplished
>quite easily but so far I havenít run across a means other than
>typing
>all the possible interactions.
>
>Thanks in advance,
>
>David
>
>
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