I have few questions for the code below and would like to get some help. My understanding is it did some thing on &dsnn._2 and output to &dsnn._3 but I don't understand
1. The d_member_id, date1, and indexdt are columns. What does class do and get here?
2. What is the variable name for day1 - day&post_days.? what does it do here?
3. This code "(where=(d_member_id ne .) drop=_:) max=;"
a. (d_member_id ne .) means d_member_id not = blank? The d_member_id shouldn't have blank.
b. drop what?
c. max what? if max a column, what is the group by?
proc means data=&dsnn._2 noprint nway; class d_member_id date1 indexdt; var day1 - day&post_days.; output out=&dsnn._3(where=(d_member_id ne .) drop=_:) max=;
Thanks.
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