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Re: st: Generate combined with if


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Generate combined with if
Date   Wed, 10 Aug 2011 16:56:09 +0200

On Wed, Aug 10, 2011 at 4:48 PM, Katia Bobulova wrote:
> I would like to construct this new price, given by the combination of
> other prices when there is a particular id.
>
> I typed:
>
> by date: gen p=(price_b (if id==10) - price_b (if id==3))/ price_b (if id==3)

This does not make sense to me, what should happen when id != 10 or
when id != 3?

Anyhow, the syntax is not valid as you noticed. Consider looking at
-help cond()-.

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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