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Re: st: foreach or forvalues to re-structure data
From
"Saleheen, Jumana" <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
Re: st: foreach or forvalues to re-structure data
Date
Wed, 13 Nov 2013 08:22:25 +0000
Hi Jo,
Thanks for this suggestion - it does look more efficient. Only problem is that I don't seem to have the 3Dmin command on my stata (I have stata12).
Is that a stata13 command? Or can - download it?
If not, is there another command I can use ?
Thanks
Jumana
----- Original Message -----
From: Joe Howard [mailto:[email protected]]
Sent: Tuesday, November 12, 2013 11:04 PM
To: statalist <[email protected]>
Subject: Re: st: foreach or forvalues to re-structure data
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This email has reached the Bank via the Internet or an external network
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Try using collapse instead -- it's more efficient...
gen minid=3Dmin(country, partner)
gen maxid=3Dmax(country, partner)
drop country partner
collapse (sum) trade, by(minid maxid)
On Tue, Nov 12, 2013 at 5:24 PM, Saleheen, Jumana
<[email protected]> wrote:
> Hi,
>
> I’d like to use the commands foreach or forvalues to re-structure my dataset. Happy to use other commands if they work better.
>
> What I have is a dataset that looks like this: country 1 trades with country 2 and 3, but not with itself
>
> country partner trade
> 1 1 0
> 1 2 20
> 1 3 30
> 2 1 10
> 2 2 0
> 2 3 30
> 3 1 20
> 3 2 10
> 3 3 0
>
> And I want to transform the data to look like this:
>
> Rowcol sumvar
> 12,21 30
> 13,31 50
> 23,32 40
>
> What I want is the pair-wise trading between two countries.
>
> So, in the end the number of observations I have should be much smaller, and equal to the pairs of countries in my data set. In the above example, it would be 3.
>
> Thanks
> Jumana
>
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--
_______________________________________________
Joe Howard [in] LinkedIn
Doctoral Student
Center for the Study of Higher and Postsecondary Education
University of Michigan
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