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st: RE: combining panel data values


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: combining panel data values
Date   Tue, 21 Oct 2008 19:06:09 +0100

What does "combine" mean? If it means add, then know that 

gen z = x + y 

is the way to add two variables to produce a third. 

Nick 
n.j.cox@durham.ac.uk 

Sean Lunde


I am working with a set of panel data grouped by brand (the panel var)  
and date (the time var). I want to combine the values of some of the  
brand variables together,( e.g. combine the salesdollar value for  
brand x with salesdollar value for brand y). All of the variables I  
want to combine are numeric.

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