I want to make the days listed in the "Comments" column as it's own column. I would prefer each day to be it's own row.
Example: If COMMENTS = "No assessment made on Day 16, Day 17, Day 19" then I would extract DAYS = 16, 17, 19
Something like this may work:
data want;
set have;
prxid=prxparse('/\bDay\s+\d+\b/i');
start=1;
end=length(comments);
do until(0);
call prxnext(prxid,start,end,comments,pos,len);
if pos=0 then leave;
day=input(scan(substr(comments,pos,len),2),8.0);
output;
end;
drop start end pos len prxid;
run;
The PRX expression looks for a word boundary (\b), followed by "Day" and 1 or more whitespaces (blanks or tab characters) (\s+), 1 or more digits (\d+) and a word boundary again. The "i" at the end means to look for e.g. both "day", "DAY" and "Day".
If you want the DAY as a character variable, just drop the INPUT function (and perhaps declare the DAY variable with e.g "length day $8;" as it will otherwise get the same length as the COMMENTS variable).
@mariko5797 wrote:
I want to make the days listed in the "Comments" column as it's own column. I would prefer each day to be it's own row.
Example: If COMMENTS = "No assessment made on Day 16, Day 17, Day 19" then I would extract DAYS = 16, 17, 19
Do you mean:
Example: If COMMENTS = "No assessment made on Day 16, Day 17, Day 19" then I would extract DAYS = 16 on one row, DAYS = 17 on another row, and DAYS= 19 on another row
so you want days to be a character variable with the days from comment variable? could you post some sample data as datelines and desired output?
Something like this may work:
data want;
set have;
prxid=prxparse('/\bDay\s+\d+\b/i');
start=1;
end=length(comments);
do until(0);
call prxnext(prxid,start,end,comments,pos,len);
if pos=0 then leave;
day=input(scan(substr(comments,pos,len),2),8.0);
output;
end;
drop start end pos len prxid;
run;
The PRX expression looks for a word boundary (\b), followed by "Day" and 1 or more whitespaces (blanks or tab characters) (\s+), 1 or more digits (\d+) and a word boundary again. The "i" at the end means to look for e.g. both "day", "DAY" and "Day".
If you want the DAY as a character variable, just drop the INPUT function (and perhaps declare the DAY variable with e.g "length day $8;" as it will otherwise get the same length as the COMMENTS variable).
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
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.