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st: AW: drop observations after first occurence of an event
From
"Martin Weiss" <[email protected]>
To
<[email protected]>
Subject
st: AW: drop observations after first occurence of an event
Date
Fri, 19 Feb 2010 14:23:58 +0100
<>
*************
clear*
inp byte(id event)
1 0
1 0
1 0
1 1
1 0
1 0
2 0
2 0
2 1
2 1
2 0
3 0
3 1
3 0
3 1
end
list, noo
bys id: drop if sum(event[_n-1])>=1
list, noo
*************
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von raoul reulen
Gesendet: Freitag, 19. Februar 2010 14:17
An: [email protected]
Betreff: st: drop observations after first occurence of an event
Dear All
Apologies for the probably straightforward query, but I cannot get it
done. I want to drop any observations after the first occurrence of an
event (coded as 1) in my dataset. I am not interested in what happens
after the event, so want to drop any subsequent observations whether
they are events or not. See example below. For id nr 1 I want to drop
all observation after the first occurence of the number "1".
id event
1 0
1 0
1 0
1 1
1 0 <--drop
1 0 <--drop
2 0
2 0
2 1
2 1 <--drop
2 0 <--drop
3 0
3 1
3 0 <--drop
3 1 <--drop
Many thanks.
Raoul
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