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Old 06-04-2009, 10:12 AM
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T-roy T-roy is offline
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Join Date: May 2002
College: UW Whitewater
Favorite beer: FFF GBH/NG Moon Man
Posts: 8,867
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found something that works:
data ...;
set...;

format revcode $3.

if substr(cpt4,5,1) = "" then do;
revcode = substr(cpt4,2,3);
cpt4 = "";
end;
run;
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