Date:         Wed, 5 Jan 2005 13:15:04 -0700
Reply-To:     murff@byu.edu
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Michael Murff <mjm33@MSM1.BYU.EDU>
Organization: MSM
Subject:      Re: macro: implicit %eval failure?
Comments: cc: "Chang Y. Chung" <chang_y_chung@HOTMAIL.COM>,
          "Dunn, Toby" <Toby.Dunn@TEA.STATE.TX.US>
Content-Type: text/plain; charset="us-ascii"

Thanks Toby and Chang!

-----Original Message-----
From: Chang Y. Chung [mailto:chang_y_chung@HOTMAIL.COM]
Sent: Wednesday, January 05, 2005 12:54 PM
To: SAS-L@LISTSERV.UGA.EDU; Michael Murff
Subject: Re: macro: implicit %eval failure?

On Wed, 5 Jan 2005 12:44:17 -0700, Michael Murff <mjm33@MSM1.BYU.EDU>
wrote:

>Hi SAS-L,
>
>Could someone tell me what might be the problem with
>
>       %if &yymm not eq 197601 %then %do;
>
>When I comment out this line (and corresponding %end), the macro runs
>error free.
>
>Thanks,
>
>Michael Murff
>Provo, UT
>
>
>695  /* appends a zero to one digit months */
>696  %macro twodgmn(month);
>697
>698      %if &month lt 10 %then 0&month;
>699      %else &month;
>700  %mend;
>701
>702  %let inIBESPath = c:\john\IBES\data\;
>703  options symbolgen mlogic;
>704  %macro RUreg(syr,eyr,smo,emo);
>705
>706      %do yr= &syr %to &eyr;
>707          %do mm=&smo %to &emo;
>708          %let yymm=&yr%twodgmn(&mm);
>709              %do fpi=1 %to 2;
>710                  %put FD&fpi&yymm;
>711                  %put *&yymm*;
>712                  %if &yymm not eq 197601 %then %do;
>713                      %if &fpi eq 2 %then %do;
>714                      %put PD&yymm;
>715                      %end;
>716                  %end;
>717              %end;
>718          %end;
>719      %end;
>720  %mend;
>721
>722  %RUreg(1976,1976,1,2);
>MLOGIC(RUREG):  Beginning execution.
>MLOGIC(RUREG):  Parameter SYR has value 1976
>MLOGIC(RUREG):  Parameter EYR has value 1976
>MLOGIC(RUREG):  Parameter SMO has value 1
>MLOGIC(RUREG):  Parameter EMO has value 2
>SYMBOLGEN:  Macro variable SYR resolves to 1976
>SYMBOLGEN:  Macro variable EYR resolves to 1976
>MLOGIC(RUREG):  %DO loop beginning; index variable YR; start value is
>1976; stop value is 1976;
>      by value is 1.
>SYMBOLGEN:  Macro variable SMO resolves to 1
>SYMBOLGEN:  Macro variable EMO resolves to 2
>MLOGIC(RUREG):  %DO loop beginning; index variable MM; start value is 1;
>stop value is 2; by
>      value is 1.
>MLOGIC(RUREG):  %LET (variable name is YYMM)
>SYMBOLGEN:  Macro variable YR resolves to 1976
>MLOGIC(TWODGMN):  Beginning execution.
>SYMBOLGEN:  Macro variable MM resolves to 1
>MLOGIC(TWODGMN):  Parameter MONTH has value 1
>SYMBOLGEN:  Macro variable MONTH resolves to 1
>MLOGIC(TWODGMN):  %IF condition &month lt 10 is TRUE
>SYMBOLGEN:  Macro variable MONTH resolves to 1
>MLOGIC(TWODGMN):  Ending execution.
>MLOGIC(RUREG):  %DO loop beginning; index variable FPI; start value is
>1; stop value is 2; by
>      value is 1.
>MLOGIC(RUREG):  %PUT FD&fpi&yymm
>SYMBOLGEN:  Macro variable FPI resolves to 1
>SYMBOLGEN:  Macro variable YYMM resolves to 197601
>FD1197601
>MLOGIC(RUREG):  %PUT *&yymm*
>SYMBOLGEN:  Macro variable YYMM resolves to 197601
>*197601*
>SYMBOLGEN:  Macro variable YYMM resolves to 197601
>ERROR: A character operand was found in the %EVAL function or %IF
>condition where a numeric
>       operand is required. The condition was: &yymm not eq 197601
>ERROR: The macro RUREG will stop executing.
>MLOGIC(RUREG):  Ending execution.

Hi, Michael,

Try either:

  foo ^= bar

or

  foo NE bar

or
  not (foo eq bar)


I don't know about the below, test it to see if it works.

  foo not = bar

Remember that sas has many similar, but not exactly the
same, "expressions": one works in the data step; another works in the
where statement only; another in the sql; ... et cetra, et cetra, ...

Cheers,
Chang