How do I compute the # of days from date to date.
I have sample data:
Obs. date1 date2 date3 date4
1 1/1/2010 2/10/2010 3/10/2010 4/5/2010
2 5/3/2011 5/5/2011 5/15/2010
I want output data:
Obs. date1 date2 date3 date4 daysdif1 daysdif2 daysdif3
1 1/1/2010 2/10/2010 3/10/2010 4/5/2010 40 28 26
2 5/3/2011 5/5/2011 5/15/2010 2 10
Any help using would be great.
thanks
data have;
infile cards truncover;
input Obs (date1 date2 date3 date4) (:mmddyy10.);
format date: mmddyy10.;
cards;
1 1/1/2010 2/10/2010 3/10/2010 4/5/2010
2 5/3/2011 5/5/2011 5/15/2011
;
data want;
set have;
array t(*) date:;
array daysdif(3);
do _n_=2 to dim(t);
daysdif(_n_-1)=t(_n_)-t(_n_-1);
end;
run;
data have;
infile cards truncover;
input Obs (date1 date2 date3 date4) (:mmddyy10.);
format date: mmddyy10.;
cards;
1 1/1/2010 2/10/2010 3/10/2010 4/5/2010
2 5/3/2011 5/5/2011 5/15/2011
;
data want;
set have;
array t(*) date:;
array daysdif(3);
do _n_=2 to dim(t);
daysdif(_n_-1)=t(_n_)-t(_n_-1);
end;
run;
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