yes, suppose, a patient had five operation with the types being the one u stated:
1->2->1->3->2
Then it should come out as an option 1->2->1->3->2, as Im interested in all changes
data want;
set have;
length group $ 256;
array lead lead:;
group=cats(lead(1));
do i=2 to dim(lead);
if lead(i)^=lead(i-1) then do;
group=cats(group,'->',lead(i));
end;
end;
drop i;
run;
This did help.
Thank you so much !
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