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Re: st: If variable x contains variable y
From
Christoph Engel <[email protected]>
To
[email protected]
Subject
Re: st: If variable x contains variable y
Date
Sun, 15 Jul 2012 17:20:32 +0200
John,
You will have to define the value of x if y does not fulfil your
condition, i.e. if it is not equal to z. Depending on your purposes you
might either want it to be a missing value, or some expression of x, say
0. I would therefore start out
gen x = .
replace x = y if y == z
(note the "==" in the if clause)
Best
Christoph Engel
Am 7/15/2012 4:59 PM, schrieb Steve Nakoneshny:
John,
At first glance, it would seem that -gen x = y if y = z- would serve as a solution. Of course, this assumes that your I'd vars are numerical and not string vars (which they probably should be stored as).
Steve
Sent via carrier pigeon
On 2012-07-15, at 8:52 AM, "[email protected]"<[email protected]> wrote:
Hello,
This is my first time using statalist, I hope I do this all correctly!
I'm looking to create a variable x which is equal to y, but only if the given value for y can be found in another variable, z. These are all id numbers, so say y is a universal id and z is a mother's id, telling you the universal id of the mother in relation to the child.
For example:
yzx
1..
2.2
3.3
42.
5..
6..
737
8..
9..
107.
So I'm trying to figure out how to create x. Any help would be much appreciated.
Thanks,
John
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--
_________________________________________________________________
Prof. Dr. Christoph Engel
Max-Planck-Institut zur
Erforschung von Gemeinschaftsgütern
Max Planck Institute for Research on Collective Goods
Kurt-Schumacher-Strasse 10
D 53113 Bonn
Tel. +49/228/91416-10
Fax +49/228/91416-11
e-mail:[email protected]
http://www.coll.mpg.de
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http://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=251559
_________________________________________________________________
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