Re: st: Automatic mean-centering?

[Nick Winter <nw53@cornell.edu>]

At 03:34 PM 8/25/2004 -0400, you wrote:
> You are probably looking for something more automated or sophisticated, 
> but I usually do something like this:
>
> foreach var in x x1 x2 x3 x4 x5 x6 x7 x8...x100{
>         egen temp`var'=mean(`var')
>         gen c`var'=`var'-temp`var'
> }
>
> drop temp*
>
> Sarah
You can avoid generating a new variable here:

foreach var in x x1 x2 {
  sum `var' , meanonly
  gen c`var' = `var'-r(mean)
}

(the meanonly option both suppresses output from the -summarize-, and 
speeds it up by not calculating the variance)

--Nick Winter


--------------------------------------------------------
Nicholas Winter                           607.255.8819 t
Assistant Professor                       607.255.4530 f
Department of Government              nw53@cornell.edu e
308 White Hall            falcon.arts.cornell.edu/nw53 w
Cornell University
Ithaca, NY 14853-4601 

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/