Date:         Fri, 29 Mar 1996 10:31:09 EST
Reply-To:     Cynthia_Stetz_at_NJQA2@PCMAILGW.ML.COM
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         Cynthia Stetz <Cynthia_Stetz_at_NJQA2@PCMAILGW.ML.COM>
Subject:      Re: Calling Global Variables Conditionally from a Nested Mac
Comments: To: Joe Carpenter <jcarpent@GNU.UVM.EDU>

Joe,
You will need to use double ampersands to have the macro variables resolve
the way you want them to.  For example; suppose I set some global macro
variables thusly:
 
  %MACRO MACRO1;
    GLOBAL WE1 WE2 WE3 WE4 WE5;
      DATA _NULL_;
        SET TOPSINFO.FISCAL&YY;
        /* POPULATE THE GLOBAL MACRO VARIABLES WITH DATASET VALUES */
        CALL SYMPUT("WE1",LEFT(PUT(WE1,$4.)));
        CALL SYMPUT("WE2",LEFT(PUT(WE2,$4.)));
        CALL SYMPUT("WE3",LEFT(PUT(WE3,$4.)));
        CALL SYMPUT("WE4",LEFT(PUT(WE4,$4.)));
        CALL SYMPUT("WE5",LEFT(PUT(WE5,$4.)));
        CALL SYMPUT("NUMWKS",LEFT(PUT(NUMWKS,$1.)));
      RUN;
  %MEND MACRO1;
 
And I want to do something to each weekly data set:
  /** DEFINE WHAT IS TO BE DONE TO EACH WEEKS DATA **/
     %MACRO BYWK(MD);
      PROC PRINT DATA=TOPSDATA.DATA&MD; RUN;
     %MEND BYWK;
 
But I want to do it for all the weeks in the month:
  /** DEFINE MACRO TO LOOP THROUGH ALL THE WEEK ENDING DATES FOR A MONTH*/
     %MACRO ALLWKS;
       %DO K = 1 %TO &NUMWKS; * for JAN,96 &NUMWKS = 5;
         %BYWK(&&WE&K); * example: when &K resolves to 1, &&WE&K resolves
                                   to 0105, giving %BYWK(0105);
       %END;
     %MEND ALLWKS;
 
The resolution of the symbolic &&we&k and its subsequent usage in the
called macro is, I believe, what you are trying to accomplish.  Is this at
all helpful?
 
Cynthia
 
 
______________________________ Reply Separator _________________________________
Subject: Calling Global Variables Conditionally from a Nested Macro
Author:  Joe Carpenter <jcarpent@GNU.UVM.EDU> at PROFGTWY
Date:    3/29/96 9:28 AM
 
 
I would appreciate any help in calling global variables conditionally
from a nested macro.  The program structure is similar to the following:
 
%global COUNT1 COUNT2 COUNT3 COUNT4 COUNT5;
%macro one (parameters);
 
   macro statements;
   call symput statements to set up global vars;
 
   invoke macro 2 with parameters 1, 2, 3, 4, or 5, depending on which
   global count variable is needed;
%mend macro 1;
 
%macro2 (countparameter);
 
   %if &count&countparameter > 0 %then %do;   e.g., &count3
     program statements;
   %end;
%mend macro2;
 
 
I would appreciate help with the %if statement - how to have the macro
variable be read as &count1 to &count5, depending on invocation.
 
 
 
Joe Carpenter
Data Analyst, Biometry Facility
University of Vermont
(802) 656-0619   email:  jcarpent@zoo.uvm.edu