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st: Re: Data management


From   "Michael Blasnik" <michael.blasnik@verizon.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: Data management
Date   Tue, 13 Feb 2007 19:25:23 -0500

No programming needed:

egen sumvar=sum(var)
gen newvar=var/(sumvar-var)

If you have groups over which you need to calculate the sum, then you can use the -by- prefix to the egen sumvar command.

Michael Blasnik


----- Original Message ----- From: "Roy,Suryadipta" <suryadipta.roy@lawrence.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, February 13, 2007 6:43 PM
Subject: st: Data management



Hi,

I am trying to generate a new variable for the following form of data:
id var
1 A
2 B
3 C
4 D
5 E
=sum(A+B+C+D+E)

I am trying to generate a third column where the 1st observation= A/(B+C+D+E); 2nd observation= B/(A+C+D+E), and so for all the five observations. Any help will be highly appreciated. I am wondering if I need to do some programming in such cases; so any guidance in this direction (so that I might be more self-sufficient henceforth) will be very helpful.
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