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Re: st: -collapse- command
From
Neil Shephard <[email protected]>
To
[email protected]
Subject
Re: st: -collapse- command
Date
Wed, 16 Jun 2010 15:39:14 +0000
On Wed, Jun 16, 2010 at 3:32 PM, Abhimanyu Arora
<[email protected]> wrote:
> Dear statalist
>
> I have 4 variables country, year,type of riot, no. of riots and would
> like to finally have country, year, riots where riots are sum across
> all types.
> I tried using collapse country city (sum) riots, by (year) but get a
> type mismatch error. Any suggestions?
collapse (sum) total_riots=riots, by(country year)
If you also have 'city' and want it by that as well then
collapse (sum) total_riots=riots, by(country city year)
See -man collapse- for the full syntax for the -collapse- command. If
you don't understand the syntax diagram then read -man language-.
Neil
--
"... no scientific worker has a fixed level of significance at which
from year to year, and in all circumstances, he rejects hypotheses; he
rather gives his mind to each particular case in the light of his
evidence and his ideas." - Sir Ronald A. Fisher (1956)
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