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st: Count observations previous to date
From
Fabian Müller <[email protected]>
To
[email protected]
Subject
st: Count observations previous to date
Date
Thu, 31 May 2012 23:53:06 +0200
Hey Guys,
i got the following problem:
I have a dataset with several countries (ccode) over time (year). Each Observation got a binary variable(ongo) showing if there was a war or not.
Now i need to create a variable for each observation counting the number of wars the particular country was involved until (and inclusive) to this date.
For example:
ccode year ongo count
200 2000 0 0
200 2001 1 1
200 2002 0 1
200 2003 0 1
200 2004 1 2
200 2004 1 3
Can't figure out a way to do this.
Tanks for Help
Fabian
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