st: Re: how to create all possible combinations for the observations of 1-variable data

[Kit Baum <baum@bc.edu>]

* say that the data are in sarah1
gen en = _n
save sarah1,replace
save sarah2,replace
expand 3
rename var1 var2
sort var2
drop en
egen en=seq(), from(1) to(3)
save sarah2,replace
use sarah1
joinby en using sarah2
drop en
l


Kit Baum, Boston College Economics
http://ideas.repec.org/e/pba1.html

On Dec 21, 2004, at 2:33 AM, statalist-digest wrote:

> I have a 1-variable Stata file like:
> var1
> A
> B
> C
> and I would like to create all possible combinations of observations 
> as below:
> var1 var2
> A     A
> A     B
> A     C
> B     A
> B     B
> B     C
> C     A
> C     B
> C     C
> I would appreciate if you can help me how to create above file.
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