Hi,
I have a dataset as below
ID | Col1 | Col2 | Mon | Year |
101 | X | Y | 1 | 2021 |
101 | X | Y | 2 | 2021 |
101 | X | Y | 2 | 2021 |
101 | X | Y | 3 | 2021 |
101 | X | Z | 4 | 2021 |
101 | Z | Y | 4 | 2021 |
101 | X | Y | 5 | 2021 |
102 | X | Y | 4 | 2021 |
102 | Z | Y | 4 | 2021 |
102 | A | B | 5 | 2021 |
I want the latest col1 and col2 values based on the latest month and year to be populated. Like below.
ID | Col1 | Col2 | Col1_2 | Col2_2 | Mon | Year |
101 | X | Y | X | Y | 1 | 2021 |
101 | X | Y | X | Y | 2 | 2021 |
101 | X | Y | X | Y | 2 | 2021 |
101 | X | Y | X | Y | 3 | 2021 |
101 | X | Z | X | Y | 4 | 2021 |
101 | Z | Y | X | Y | 4 | 2021 |
101 | X | Y | X | Y | 5 | 2021 |
102 | X | Y | A | B | 4 | 2021 |
102 | Z | Y | A | B | 4 | 2021 |
102 | A | B | A | B | 5 | 2021 |
Any suggestions. Thanks in advance
Welcome to the communities!
Given that your dataset is already sorted, a double DO loop does this quite nicely:
data want;
do until (last.id);
set have;
by id;
end;
col1_2 = col1;
col2_2 = col2;
do until (last.id);
set have;
by id;
output;
end;
run;
Welcome to the communities!
Given that your dataset is already sorted, a double DO loop does this quite nicely:
data want;
do until (last.id);
set have;
by id;
end;
col1_2 = col1;
col2_2 = col2;
do until (last.id);
set have;
by id;
output;
end;
run;
Using a SQL:
proc sql;
create table want as
select
l.*,
r.col1_2,
r.col2_2
from
have l
left join
( select id, col1 as col1_2, col2 as col2_2
from have
group by id, year
having max(mon)=mon
) r
on l.id=r.id
order by id, year, mon
;
quit;
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