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Re: st: how to generate a variable where one third of values would be randomly assigned


From   Ekaterina Hertog <ekaterina.hertog@sociology.ox.ac.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: how to generate a variable where one third of values would be randomly assigned
Date   Mon, 12 Dec 2011 15:58:30 +0000

Dear Nick and Maarten, thank you,
Ekaterina

On 12/12/2011 15:46, Maarten Buis wrote:
On Mon, Dec 12, 2011 at 4:04 PM, Ekaterina Hertog wrote:
I use stata 11 and I need to generate a variable where two thirds of
observations (about 1300 obs) will be equal to 120 and the rest of the
values are randomly assigned, but are all integers and less than 120.
You did not specify the distribution from which you want to draw your
random numbers, so I'll assume it to be a uniform distribution of
integers between 0 and 120 (exclusive):

*------------ begin example -----------
drop _all
set obs 1950
gen x = cond(                     ///
              _n<=1300,           ///
              120,                 ///
              ceil(119*runiform()) ///
              )
*------------- end example ------------

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------
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