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st: Creating a variable


From   "Mike Kim" <kalisperos@gmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Creating a variable
Date   Sun, 27 Dec 2009 22:11:06 -0600

Dear all,

I would like to create a variable that adds all revenues from all OTHER id 
within the past 14 days (including current date). How can I create the 
"newvar" in the following example?

id      date       revenue  newvar
1    8-Mar-07      1         0
2    15-Mar-07    2         4     (=1+3)
3    15-Mar-07    3         3     (=1+2)
4    22-Mar-07    4         6     (=1+2+3)
5    29-Mar-07    5        15     (=2+3+4+6)
6    29-Mar-07    6        14     (=2+3+4+5)
7    5-Apr-07       7        23     (=4+5+6+8)
8    5-Apr-07       8        22     (=4+5+6+7)
......


Thank you in advance.
Mike.

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