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st: creating variable with randomly missing values


From   "Ahmed Arif" <arifaa@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: creating variable with randomly missing values
Date   Thu, 6 Dec 2007 18:49:33 -0500

I have a dataset with variables x and y. the dataset has 5000
observation. i want to generate another variable xmiss, such that 50%
of x values are dropped (recoded as missing value) randomly from the
dataset w/o affecting values of y. is there an easy way to do this?
thanks

-- 
Ahmed Arif
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