I recently came across some SAS code that contained a SET statement inside a DO loop. Can someone explain to me exactly how SAS is processing the data or any papers that might help. I understand arrays and loops, i just have never seen the set statement inside a loop before.
Thanks in Advance.
DATA NEW (KEEP=NAME DATE1-DATE20);
ARRAY DATES {20} DATE1-DATE20;
OBSNO + 1;
DO I=1 TO 20 UNTIL (LAST.NAME);
SET OLD;
BY NAME;
IF FIRST.NAME THEN OBSNO=1;
DATES{I} = DATE;
END;
SET is an executable statement. So if you code it in a loop then it just reads one observation for each time it is called.
You have what has been termed a DOW loop. See this earlier posting that has a link to an article on DOW loops.
SET is an executable statement. So if you code it in a loop then it just reads one observation for each time it is called.
You have what has been termed a DOW loop. See this earlier posting that has a link to an article on DOW loops.
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