SAS Macro : A Dynamic %Do Loop

Suppose you need to pass a variable in loop based on the input defined in a macro.
%macro report (input=, var = , class=);
%let n=%sysfunc(countw(&var));
%do i=1 %to &n;
%let val = %scan(&var,&i);
proc means data = &input noprint nway;
class &class;
vars &val;
output out=out&i mean= median= / autoname;
run;
%end;
%mend;

options mprint;
%report(input= test, var = b c, class=a);

When you execute the above sas program, it generates the following statements :

proc means data = &input noprint nway;
class a;
vars b;
output out=out1 mean= median= / autoname;
run;

proc means data = &input noprint nway;
class a;
vars c;
output out=out2 mean= median= / autoname;
run;

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Deepanshu founded ListenData with a simple objective - Make analytics easy to understand and follow. He has over 8 years of experience in data science and predictive modeling. During his tenure, he has worked with global clients in various domains like Banking, Insurance, Telecom and Human Resource.

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2 Responses to "SAS Macro : A Dynamic %Do Loop"
  1. Hi deepanshu

    What does sysfunc do????..does it convert into character value??

    ReplyDelete
    Replies
    1. Sysfunc is used to apply functions within macro. You can use all functions of data steps by using sysfunc

      Delete

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