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# Re: st: creating deciles by location by year

 From Nick Cox To statalist@hsphsun2.harvard.edu Subject Re: st: creating deciles by location by year Date Wed, 15 Aug 2012 09:04:37 +0100

```This isn't really a different problem. It is also an FAQ:

FAQ     . . . . . . . . . . Making foreach go through all values of a variable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
8/05    Is there a way to tell Stata to try all values of a
particular variable in a foreach statement without
specifying them?
http://www.stata.com/support/faqs/data/foreach.html

gen size_decile = .
egen group = group(location year)
su group, meanonly

forval i = 1/`r(max)' {
xtile decile_temp=size if group==`i', nq(10)
replace size_decile = decile_temp if group == `i'
drop decile_temp
}

On Wed, Aug 15, 2012 at 2:28 AM, Alexey Lyubimov <alyubimov@bus.ucf.edu> wrote:

> I am using Stata 11, I have a panel data set that has multiple years, locations, and companies.  I am trying to create deciles by year by location.
> I use the following code to calculate deciles by year, but how can I add one more level and calculate by year by location?
>
> gen size_decile = .
> levelsof year, local(tempyear)
> foreach i in `tempyear' {
> xtile decile_temp=size if year==`i', nq(10)
> replace size_decile = decile_temp if missing(size_decile)
> drop decile_temp
> }
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```