BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
corkee
Calcite | Level 5

Hi, I am trying to extract only observations with the smallest absolute value for v1datediff. There are multiple rows of data for each unique individual, so not only do I want to extract the minimum v1datediff, but I also want to make sure that if the minimum v1datediff has missing values for another column, then I would take the next minimum with complete data. Is this doable in PROC SQL or base SAS?

 

participant_id     length     absv1datediff
1                         2            1
1                         2.2          9
1                         .            2
1                         2.1          3
2                         .            0
2                         1.9          1
2                         1.9          5

So for the above dataset, I'd like to extract, for participant 1, the first row (where length is 2). For participant 2, the minimum absv1datediff is 0 (row 5), but since it has missing length, I'd like to extract the NEXT minimum, which is row 6. 

 

I tried something like the following:

 

proc sql;
	create table v1final as
	select *, abs(v1datediff) as absv1datediff, abs(ehr_height_cm - inflengthcm_v1) as measurement_diff
	from visit1_merged
	group by participant_id
	having absv1datediff = min(absv1datediff) and length ne .
	;
quit;
1 ACCEPTED SOLUTION

Accepted Solutions
Astounding
PROC Star

For LENGTH, use WHERE instead of HAVING:

 

where length ne .

 

instead of

 

and length ne .

 

The rest can stay the same.

View solution in original post

2 REPLIES 2
Astounding
PROC Star

For LENGTH, use WHERE instead of HAVING:

 

where length ne .

 

instead of

 

and length ne .

 

The rest can stay the same.

sas-innovate-2024.png

Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only.

Pre-conference courses and tutorials are filling up fast and are always a sellout. Register today to reserve your seat.

 

Register now!

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

Click image to register for webinarClick image to register for webinar

Classroom Training Available!

Select SAS Training centers are offering in-person courses. View upcoming courses for:

View all other training opportunities.

Discussion stats
  • 2 replies
  • 1780 views
  • 0 likes
  • 2 in conversation