I have a range of dates. I would like to count how many months are within each set of dates along with creating a new variable for each month. For example;
data have;
input start_date end_date;
01/01/2010 12/31/2010
05/01/2010 12/31/2010
05/01/2010 05/14/2010
06/13/2010 08/28/2010;
run;
I would like to create a new variable for each month that contains the counts for each number of months between the start and end dates. For example;
01/01/2010 12/31/2010 --> month1=1 month2=1, month3=1 . . . .month12=1;
05/01/2010 12/31/2010 --> month5=1 month6=1, month7=1 . . . .month12=1;
05/01/2010 05/14/2010 --> month5=1;
06/13/2010 08/28/2010 --> month6=1 month7=1 month8=1;
Based on this sample data, in the end I should have the below counts for each month.
Month1=1
Month2=1
Month3=1
Month4=1
Month5=3
Month6=3
Month7=3
Month8=3
Month9=2
Month10=2
Month11=2
Month12=2
Thank you!
Sophia
Are all of your data pairs always within the same calendar year? Are the dates SAS date values or strings?
For your example this seems to work.
data have;
informat start_date end_date mmddyy10.;
format start_date end_date mmddyy10.;
input start_date end_date;
datalines;
01/01/2010 12/31/2010
05/01/2010 12/31/2010
05/01/2010 05/14/2010
06/13/2010 08/28/2010
;
run;
data want;
set have;
array months month1-month12;
do i= month(start_date) to month(end_date);
months=1;
end;
drop i;
run;
Are all of your data pairs always within the same calendar year? Are the dates SAS date values or strings?
For your example this seems to work.
data have;
informat start_date end_date mmddyy10.;
format start_date end_date mmddyy10.;
input start_date end_date;
datalines;
01/01/2010 12/31/2010
05/01/2010 12/31/2010
05/01/2010 05/14/2010
06/13/2010 08/28/2010
;
run;
data want;
set have;
array months month1-month12;
do i= month(start_date) to month(end_date);
months=1;
end;
drop i;
run;
Thanks! That worked perfectly.
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.