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st: Re: Cumulative sum


From   "Michael Blasnik" <michael.blasnik@verizon.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: Cumulative sum
Date   Fri, 30 Apr 2004 17:27:56 -0400

no loop needed...

by country: gen cum_amount=sum(amount)

Michael Blasnik
michael.blasnik@verizon.net

----- Original Message ----- 
From: "de la Garza, Adrian" <ADelagarza@imf.org>
To: <statalist@hsphsun2.harvard.edu>
Sent: Friday, April 30, 2004 4:51 PM
Subject: st: Cumulative sum


> Hello everyone.
> 
> I would like to create a variable that gives me the cumulative of an
> amount by country, like so:
> 
> country year quar amount cum_amount
> Argentina 1990 1 100 100
> Argentina 1990 2 50 150
> Argentina 1990 2 25 175
> Argentina 1990 2 100 275
> Argentina 1990 3 200 475
> ...
> Bolivia 1990 1 25 25
> Bolivia 1990 1 30 55
> ...
> 
> Does anyone know a command that would do this without needing to write a
> loop?
> 
> Thank you!
> Adrian
> 
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