egen Tot-Inc = sum(Income), by(ID)
-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Patricia Vera Rojas
Sent: Tuesday, June 13, 2006 11:02 AM
To: statalist@hsphsun2.harvard.edu
Subject: st: sum question
Hi everyone,
I have:
ID Income
x 15
x 20
x 5
xx 15
xx 10
xx 10
xx 10
I want to get:
ID Tot-Inc
x 40
x 40
x 40
xx 45
xx 45
xx 45
xx 45
How can I do it?
Thanks a lot,
Patricia
> I have a recursive problem involving linked list of
> structures in Mata, but
> after some number of chains (number is not fixed, that's
> why I decided to
> use list instead of a matrix) I don't need an earlier
> members of the list
> and they can be dropped to free some memory. If I don't
> drop them, my list
> is getting too long and even makes Stata to crash.
>
> I was wondering if there was some way of clearing
> structures like other
> objects in Stata.
>
> Thanks in advance,
> Zurab
>
>
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>
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