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Re: st: Creating a data subset with subjects chosen at random
From
[email protected] (Brendan Halpin)
To
[email protected]
Subject
Re: st: Creating a data subset with subjects chosen at random
Date
Fri, 15 Jun 2012 16:08:39 +0100
On Fri, Jun 15 2012, Amal Khanolkar wrote:
> Just a question:
>
> in the command line: by cbirth:
>
> gen subsamp = _n <= (_N+0.5)*0.05
>
> 0.05 specifies 5% proportion right?
Yes. If you replace this by 100000/2991200.0 you should get close to
exactly 100,000 cases.
I think I'm correct in adding 0.5 to _N for rounding purposes; I haven't
tested it, and with this sample size it is likely immaterial.
Regards,
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
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