I think I am doing something wrong with the retain statement.
I hope someone can guide me.
I have a table like this and I want to carry forward the last observed date
ID date
1 01jan2013
1 .
1 .
1 12mar2013
1 .
1 .
2 07feb2013
2 .
2 .
2 25apr2013
2 .
2. .
The result should look like this:
ID date
1 01jan2013
1 01jan2013
1 01jan2013
1 12mar2013
1 12mar2013
1 12mar2013
2 07feb2013
2 07feb2013
2 07feb2013
2 25apr2013
2 25apr2013
2. 25apr2013
Thanks
Thomas
You could use the update trick. Vertical coalesce.
Thanks!
Works fine!
Just curious, would it be possible to do the same operation with retain? Just trying to understand the retain statement
/Thomas
Hi,
data want (drop=lstdate);
set have;
retain lstdate;
if date ne . then lstdate=date;
else date=lstdate;
run;
data have; input ID date :date.; format date date9.; cards; 1 01jan2013 1 . 1 . 1 12mar2013 1 . 1 . 2 07feb2013 2 . 2 . 2 25apr2013 2 . 2. . ;;;; run; data want(drop=d); set have(rename=(date=d)); by id; retain date; if first.id or not missing(d) then date=d; format date date9.; run;
Xia Keshan
bollibompa wrote:
Just curious, would it be possible to do the same operation with retain? Just trying to understand the retain statement
/Thomas
As you can see from the other replies it NOT possible to do Vertical Coalesce with retain.
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