A trivial data step solution not using monotonic().
proc sort data=have;
by id;
run;
data want;
set have;
by id;
if first.id then newid+1;
run;
Pregunta
Trying to make a more simple unique identifier from already existing identifier. Starting with just and ID column I want to make a new, more simple, id column so the final data looks like what follows. There are 1million + id's, so it isnt an option to do if thens, maybe a do statement?
ID NEWid
1234 1
3456 2
1234 1
6789 3
1234 1
Solución
A trivial data step solution not using monotonic().
proc sort data=have;
by id;
run;
data want;
set have;
by id;
if first.id then newid+1;
run;
Otros consejos
using proc sql.. (you can probably do this without the intermediate datasets using subqueries, but sometimes monotonic doesn't act the way you'd think in a subquery)
proc sql noprint;
create table uniq_id as
select distinct id
from original
order by id
;
create table uniq_id2 as
select id, monotonic() as newid
from uniq_id
;
create table final as
select a.id, b.newid
from original_set a, uniq_id2 b
where a.id = b.id
;
quit;