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


From   Maarten Buis <maartenlbuis@gmail.com>
To   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 16:46:30 +0100

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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