Could someone please help me to understand how I could convert the following into PROC SORT then PROC RANK?
ROW_NUMBER() OVER (PARTITION BY UNIQUE_ID ORDER BY mem_no desc, drug_id desc, RX_FILL_DT ASC) AS RANK
SAS EG v. 7.13
PROC SORT data=have;
by mem_no desc descending drug_id RX_FILL_DT ASC;
proc rank data=have;
by < ... >;
I'm not sure what variable is being ranked here or if it's just creating a count variable per group. I suspect the latter which would be easier in a data step.
data want; set have; by < >; if first rx_fill_dt_asc then count=0; count+1; run;
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