Hi ,
my question is how I can only keep the IDs with the highest value of A
data have;
input id A B C;
cards;
1 2 3 4
1 4 2 5
1 5 3 12
1 7 34 3
2 5 5 5
2 6 12 0
2 9 3 2
2 11 3 1
3 7 6 5
3 23 3 2
3 12 12 44
4 4 23 33
4 9 6 1
5 5 7 2
6 7 8 1
run;
data want;
input id A B C;
cards;
1 7 34 3
2 11 3 1
3 23 3 2
4 9 6 1
5 5 7 2
6 7 8 1
run;
Thanks
Please try
proc sort data=have;
by id a;
run;
data want;
set have;
by id a;
if last.id;
run;
Please try
proc sort data=have;
by id a;
run;
data want;
set have;
by id a;
if last.id;
run;
by proc sql
proc sql;
create table want as select a.* from have as a
inner join
(select id, max(a) as maxa from have group by id) as b on a.id=b.id and a.a=b.maxa;
quit;
Hi @ali_far,
Another option is PROC SUMMARY:
proc summary data=have;
by id;
var a;
output out=want(drop=_:) max= maxid(a(b c))=;
run;
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