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;
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