%let varlist1 =a b c d e f;
%let varlist2 = c d e;
How to use macro or function to test if var in varlist2 are in varlist1?
Say, I can use %scan() function and do loop to test, but I don't know if there is a macor counterpart of 'in' of sas base?
e.g, "%scan(&varlist2,1)" in &varlist1, but in SAS base, &varlist1 should be quoted for each element of &varlist2, how can I make it quoted so that I can use SAS base in operator?
Or alternatively is there other way to achieve this without sas base 'in' operator?
Does order matter?
Do you want to test each value in VARLIST2 are in VARLIST1?
%let found=0;
%do i=1 %to %sysfunc(countw(&varlist2)) ;
%if %sysfunc(indexw(&varlist1,%scan(&varlist1,&i))) %then %let found=1;
%end;
If you have 9.2 onwards you can using the IN operator.
I have an older version so the following has not been tested.
%LET VARLIST1 = A B C D E F;
%LET VARLIST2 = C D E;
%MACRO TEST;
%DO I = 1 %TO %LENGTH(%SYSFUNC(COMPRESS(&VARLIST2.)));
%IF %SCAN(&VARLIST2,&I.) IN &VARLIST1. %THEN %DO
%LET EXIST&I. = Y;
%END;
%END;
%MEND;
%TEST;
Does the order matter ?
%LET VARLIST1 = A B C D E F; %LET VARLIST2 = C D E; data _null_; if find(symget('VARLIST1'),symget('VARLIST2')) then putlog "Found" ; else putlog "Not Found"; stop; run;
Xia Keshan
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