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Day 10: PROC PRINT and PROC SORT — SAS vs R

Print listings, sort data and remove duplicates in SAS and in R

Practice PROC PRINT (VAR, ID, SUM, NOOBS, LABEL, SPLIT=) and PROC SORT (BY, DESCENDING, OUT=, NODUPKEY, DUPOUT=, NODUPRECS) against select, head, flextable, arrange and distinct in R, including missing-value and case sort traps.