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Day 25: Macro Variables — SAS vs R

%LET, SYMPUTX, INTO: and %SYSFUNC versus plain R variables

Practice SAS macro variables against R variables: %LET and %PUT, resolution in double quotes, automatic date variables, CALL SYMPUTX and SELECT INTO, %EVAL vs %SYSEVALF, %SYSFUNC, macro text functions, quoting and scope, using the ABC-101 ADSL and ADAE data.