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st: RE: Random assignment


From   "FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <alan.h.feiveson@nasa.gov>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Random assignment
Date   Wed, 24 Dec 2003 15:18:51 -0600

Here's one way - suppose your dichotomous variable is y:

summ y
local p=r(mean)  
replace y=uniform<=`p' if y==.

Al Feiveson



-----Original Message-----
From: celdjt@umich.edu [mailto:celdjt@umich.edu]
Sent: Wednesday, December 24, 2003 12:40 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Random assignment


I have a data set with 50 missing values for a dichotomous variable, coded 
1 and 0; I would like to recode the 50 missing values to non-missing, 
inserting 1 and 0's on a random basis proportionate to their presence in 
the overall data set. Any porcedure for this sort of thing in stata. 
Thanks.

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