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Re: st: create unique random number variable
From
Stas Kolenikov <[email protected]>
To
[email protected]
Subject
Re: st: create unique random number variable
Date
Tue, 24 Apr 2012 09:43:07 -0500
On Tue, Apr 24, 2012 at 4:37 AM, raoul reulen <[email protected]> wrote:
> Hello
>
> I'm trying to generate a random number variable like this:
>
> .set seed 12345
> .gen x = int(1000*uniform())
>
> However, the random numbers in variable x are not unique. Is there a
> way to ensure they are unique?
clear
set obs 400
* this is your sample size
generate uu = int(1000*uniform())
bysort uu: generate byte nonuniq = _n > 1
sum nonuniq, mean
while r(max) > 0 {
bysort uu: replace uu = int(1000*uniform()) if _n > 1
bysort uu: replace nonuniq = _n > 1
sum nonuniq, mean
}
drop nonuniq
--
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.
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