Date:         Mon, 8 Sep 2003 04:40:56 -0400
Reply-To:     "Thomasset Pierre (Office)" <pierre.thomasset@FORTISAG.BE>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Thomasset Pierre (Office)" <pierre.thomasset@FORTISAG.BE>
Subject:      Re: macro as macro parameter?
Comments: To: Zibao Zhang <zibaozhang@HOTMAIL.COM>

Hello,
You can maybe adapt the following example, found in the SAS docs.
It uses the /parmbuff option in the %macro statement.
Regards.

*
Example 3: Using the %MACRO Statement with the PARMBUFF Option
The macro PRINTZ uses the PARMBUFF option to allow you to input a different
number of arguments each time you invoke it:
;

%macro printz /parmbuff;
   %let num=1;
   %let dsname=%scan(&syspbuff,&num);
   %do %while(&dsname ne);
      proc print data=&dsname;
      run;
      %let num=%eval(&num+1);
      %let dsname=%scan(&syspbuff,&num);
   %end;
%mend printz;

*
This invocation of PRINTZ contains four parameter values, PURPLE, RED,
BLUE, and TEAL although the macro definition does not contain any
individual parameters:
;

data purple; do i= 1 to 2; output; end; run;
data red; do i= 1 to 3; output; end; run;
data blue; do i= 1 to 4; output; end; run;
data teal; do i= 1 to 5; output; end; run;

%printz (purple, red, blue, teal);

*
As a result, SAS receives these statements:
;
PROC PRINT DATA=PURPLE;
RUN;
PROC PRINT DATA=RED;
RUN;
PROC PRINT DATA=BLUE;
RUN;
PROC PRINT DATA=TEAL;
RUN;

On Mon, 8 Sep 2003 12:13:54 +0800, Zibao Zhang <zibaozhang@HOTMAIL.COM>
wrote:

>Hi Leonora,
>
>Sorry, the subject should be "Macro variable as macro parameter?"!
>
>Maybe I haven't express my problem correctly, The problem is asked from my
friend, he want use &MacrVar to indict the parameters in %macro test, and
the &MacrVar. is generated from another macro. So now use %let to simply
the problem. the code seems be like this:
>
>%let MacrVar =N1, N2;
>
>%macro test(&MacrVar.);
>
> data _null_;
>   Sum =(N1 + N2);
>  Put sum;
> run;
>
>%mend test;
>
>%test(N1=10, N2=20);
>
>============
>Kind Regards,
>Zibao Zhang, MD
>