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st: RE: RE: assigning a specific row as a local variable

From   Pradipto Banerjee <>
To   "" <>
Subject   st: RE: RE: assigning a specific row as a local variable
Date   Mon, 1 Oct 2012 18:08:34 -0500

Thanks, David. I wanted to assign the value to local macro `x' instead of a variable `x'. Actually, I have found a program -valuesof- which is pretty much what I was looking for.

-----Original Message-----
From: [] On Behalf Of David Radwin
Sent: Monday, October 01, 2012 7:01 PM
Subject: st: RE: assigning a specific row as a local variable

There's no such thing as a "local variable" in Stata. I think you want a
-tempvar- (temporary variable with a local macro name). First you declare
the -tempvar-, then you use it.

Based on your description, I would create two -tempvars-. In this example,
n = 2.

. tempvar x

. tempvar cond_y_sum

. gen `cond_y_sum' = sum(cond_y) // creates cumulative sum of values where
cond_y equals 1

. gen `x' = y if `cond_y_sum' == 2 // assigns value of y to `x' for the
nth observation where y equals 1

David Radwin
Senior Research Associate
MPR Associates, Inc.
2150 Shattuck Ave., Suite 800
Berkeley, CA 94704
Phone: 510-849-4942
Fax: 510-849-0794

> -----Original Message-----
> From: [mailto:owner-
>] On Behalf Of Pradipto Banerjee
> Sent: Monday, October 01, 2012 3:35 PM
> To:
> Subject: st: assigning a specific row as a local variable
> 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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