topic Macro - Conditionally Process some code in SAS Programming

Macro - Conditionally Process some code

SasStatistics — Tue, 22 Jun 2021 13:07:10 GMT

The pseudo code below will demonstrate what I would like to do.

Assume I have a macro of the sort:

%MyMacro(Part1YesOrNO, Part2YesOrNO); 
   Some code representing "Part 1"; 
      .
      . 
      . 
   Some code representing "Part 2"; 
%mend MyMacro;

Now, if the user types in:

%MyMacro(Yes, Yes);

both parts of the Macro should be run.

If the user types in:

%MyMacro(Yes, No);

Only part 1 of the Macro should be run.

Any advice of how I could achieve this kind of functionality?

Re: Macro - Conditionally Process some code

tbellmer_wf — Tue, 22 Jun 2021 13:15:55 GMT

%macro mymacro(part1yesorno, part2yesorno);

%if %upcase(%substr(&part1yesorno, 1, 1)) = Y %then %do;

/* your part1 code goes here */

%end;

%if %upcase(%substr(&part2yesorno, 1, 1) = Y %then %do;

/* your part2 code goes here */

%end;

%mend;

%mymacro(Yes, No);

Re: Macro - Conditionally Process some code

PaigeMiller — Tue, 22 Jun 2021 13:17:59 GMT

%MyMacro(Part1YesOrNO, Part2YesOrNO); 
    %if %upcase(&part1yesorno)=YES %then %do;
   Some code representing "Part 1"; 
    %end;
      . 
   %if %upcase(&part2yesorno)=YES %then %do;   . 
   Some code representing "Part 2"; 
    %end;
%mend MyMacro;

Hint: don't use such long variable names unless they are absolutely necessary, I would create the macro as follows

%macro mymacro(part1,part2);

unless you are a much better typist than I am, I find shorter name that still have meaning a much better approach, its less typing and less chance for error. Also, I prefer values of Y or N to Yes or No, again simplicity and less typing and less chance for error.

Re: Macro - Conditionally Process some code

mkeintz — Tue, 22 Jun 2021 13:19:37 GMT

Consider:

%MyMacro(Part1YesOrNO, Part2YesOrNO); 
  %if &part1yesorno=Yes %then %do;
     *Some code representing "Part 1"; 
  %end;
  %if &part2yesorno=Yes %then %do;
     *Some code representing "Part 2"; 
  %end;
%mend MyMacro;