st: Data management

["Roy,Suryadipta" <suryadipta.roy@lawrence.edu>]

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.

Thanks!
Suryadipta.
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