topic Re: macro skill problem in SAS Procedures

macro skill problem

Mike_Davis — Mon, 02 Jul 2012 17:23:28 GMT

Hello everyone,

Why if I use (5 or 6 )to replace (3 and 4) will NOT get 'a' in the SAS log?

Thanks!

Mike

/*1.*/%let g=2;
/*2.*/%let cc3=a;
/*3.*/%let k= %eval(&g+1);
/*4. */%put &&cc&k;

/*5.*/%put &&cc%eval(&g+1);
/*6.*/%put &cc%eval(&g+1);

Re: macro skill problem

Haikuo — Mon, 02 Jul 2012 17:38:58 GMT

cause '&' resolves before %eval computation.

&&cc%eval(&g+1) -> &cc%eval(2+1) -> 'warning: cc not resolved' ->&cc3

Haikuo

Re: macro skill problem

FriedEgg — Mon, 02 Jul 2012 17:43:37 GMT

The %eval is just going to concatenated to the resolution of the macro variable &&cc or &cc. Compound macro variable resolution is not available in that syntax.

http://support.sas.com/documentation/cdl/en/mcrolref/61885/HTML/default/viewer.htm#a001071915.htm

%let g=2;

%let cc3=a;

%put %unquote(%nrstr(&cc)%eval(&g + 1));

Re: macro skill problem

Mike_Davis — Mon, 02 Jul 2012 19:01:30 GMT

awesome!

Thank you!

Re: macro skill problem

Florent — Tue, 03 Jul 2012 13:53:39 GMT

Hi Mike,

You might also use the following alternative:

%put %superq(cc%eval(&g+1));

Regards,

Florent

Re: macro skill problem

Mike_Davis — Tue, 03 Jul 2012 18:01:38 GMT

That is fantastic!

Thanks!

Mike