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st: RE: random sample


From   "Marcella Sapun" <msapun@jhu.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: random sample
Date   Thu, 26 Oct 2006 11:16:14 -0400

It worked fine! 
Thanks Maarten

Marcella

>>> Maarten Buis <M.Buis@fsw.vu.nl> 10/26/2006 11:02 AM >>>
Marcella:
if you have enough memory to read the data into memory than you can
do:

use bigfile.dta, clear
keep if uniform() < .1

HTH,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z434 

+31 20 5986715

http://home.fsw.vu.nl/m.buis/ 
-----------------------------------------

--- Marcella Sapun wrote:
 
I want to read randomly 10% of a data set that contains about 1
million
records and 100 variables. How do I do that in stata?


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