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Re: st: Scaling of variables


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Scaling of variables
Date   Tue, 7 Jun 2011 09:15:13 +0100

foreach v of var <put your varlist here> {
     gen `v'_at = `v' / at
}

A varlist is always a list of variable names, but possibly including
wildcards such as foo? or bar*.

Nick

On Tue, Jun 7, 2011 at 9:05 AM, Achmed Aldai <Hauptseminar@gmx.de> wrote:
> Hi Maarten
>
> sorry I have to ask again about the loops:
> What would be my lname and do I use in or of list? I have like 30 variables that have to be scaled by at.
> If I use of what would be the name of my varlist or can I just set a random name for that?
>
> Concerning the macros, I would do it with ds [varlist], I guess the name from above and then say var/at?
>
> Thanks a lot for your help
>
> -------- Original-Nachricht --------
>> Datum: Tue, 7 Jun 2011 09:21:34,
>  +0200
>> Von: Maarten Buis <maartenlbuis@gmail.com>
>> An: statalist@hsphsun2.harvard.edu
>> Betreff: Re: st: Scaling of variables
>
>> --- On Tue, Jun 7, 2011 at 9:10 AM, Achmed Aldai wrote:
>> > I have to do an analysis with balance sheet data of several firms
>> (gvkey) and want to scale some of the variables by total assets(at). E.g. total
>> liablities, earnings, and so on. Is there a way that I can do this with one
>> command and not do it for each variable since I have around 40 and that
>> would take a lot of time. Still I dont have to scale all of them by total
>> assets. The company (gvkey) and industry specifications for example should stay
>> unchanged.
>>
>> You can loop over variables, see -help foreach-. The trick is than is
>> to create a macro containing the appropriate variables, and feed that
>> macro to -foreach-. For the creation of that macro I often use -ds-.
>>

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