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st: AW: running sum
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
st: AW: running sum
Date
Wed, 4 Aug 2010 16:53:57 +0200
<>
*************
clear*
inp byte(LINE SUBST POWER)
1 1 10
1 2 20
1 3 15
1 4 5
end
bys LINE (SUBST): gen CUM_POW=sum(POWER)
li, noo sepby(LINE)
*************
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Maximiliano
Manuel Silva Correa
Gesendet: Mittwoch, 4. August 2010 16:50
An: [email protected]
Betreff: st: running sum
Dear stata people,
Im stuck trying to do a running sum using by. My problem is like:
Suppose we have serveral power distribution lines (composed of
serveral substations) all around the states. Suppose our variables are
LINE SUBST POWER
I want to generate a variable CUM_POW containing the cummulative sum
of POWER by LINE SUBST
For instance,
LINE SUBST POWER CUM_POW
1 1 10 10
1 2 20 30
1 3 15 45
1 4 5 50
how goes the sintaxis for that?
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