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Hello!
SAS newbie here 🙂
I have table similar to this:
ID | Version | Value |
---|---|---|
100 | 0 | 10 |
100 | 1 | 11 |
200 | 0 | 20 |
200 | 1 | 21 |
200 | 2 | 22 |
200 | 3 | 21 |
200 | 4 | 20 |
300 | 0 | 40 |
300 | 1 | 41 |
300 | 2 | 43 |
I want to extract data and make a new table with only unique IDs with the highest version and corresponding value.
Like this:
ID | Version | Value |
---|---|---|
100 | 1 | 11 |
200 | 4 | 20 |
300 | 2 | 43 |
This is may be easy, but I'm new to SAS 🙂
Any suggestions?
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There are a number of ways. Here is one using proc sort.
proc sort data=have;
by id descending version;
run;
proc sort data=have out=want nodupkey;
by id;
run;
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Thank you, it worked
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You could also do it using proc sql:
proc sql noprint;
create table want as
select *
from have
group by id
having version eq max(version)
;
quit;
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The data set also appears to be sorted by ID and Version, in which case, you can use:
proc sort data=have; *--- only needed if not already sorted by ID and Version;
by id version;
run;
data want;
set have;
by id;
if last.id; *--- highest version for each id due to sorting;
run;
Use which ever method you find more natural and intuitive to you. Art's methods all work.