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st: assigning a specific row as a local variable


From   Pradipto Banerjee <pradipto.banerjee@adainvestments.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: assigning a specific row as a local variable
Date   Mon, 1 Oct 2012 17:34:46 -0500

Hi,

I want to define a local variable x as the nth value of a column y that satisfies a particular condition.

More specifically, suppose I have y and cond_y as follows:

y       cond_y

1       1
3       0
1       0
2       1
4       1

I want to assign

local x = y if "y is say the 2nd value where cond_y is true"

How can I achieve this?

Thanks.




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