topic Re: how to use sas macro to replace a path in SAS Programming

how to use sas macro to replace a path

Bal23 — Fri, 14 Apr 2017 15:32:30 GMT

I find “pipe” is quite helpful. I need to replace the old path with a different path so I am thinking to use a macro to do the work.

The old one:

filename DIRLIST pipe 'dir "C:\ab\c\*.txt" /b ';

data dirlist ;

infile dirlist lrecl=200 truncover;

input file_name $100.;

run;

I am thinking to define a sas macro like

%let datapath= d:\ce\fi\gh

And then put &datapath to replace the old path. It seems it does not work. Any advice how to define a sas macro to replace old path// no lib is needed

Thank you

Re: how to use sas macro to replace a path

Tom — Fri, 14 Apr 2017 15:41:51 GMT

Macro triggers are not resolved inside of single quotes. Use double quotes instead if you want SAS to recognize the reference to the macro variable.

%let datapath= d:\ce\fi\gh ;

filename DIRLIST pipe "dir ""&datapath\*.txt"" /b";

You can use the macro function %SYSFUNC() to call the QUOTE() function to make it easier. That way you do not need to double up the embedded double quote characters in the command string since the QUOTE() function will take care of that for you.

filename DIRLIST pipe %sysfunc(quote(dir "&datapath\*.txt" /b));

Re: how to use sas macro to replace a path

nehalsanghvi — Fri, 14 Apr 2017 15:47:04 GMT

https://communities.sas.com/t5/General-SAS-Programming/SAS-Macro-using-doubles-quotes-filename-pipe/td-p/146921

Re: how to use sas macro to replace a path

PaigeMiller — Fri, 14 Apr 2017 15:47:12 GMT

@Bal23 wrote:

I find “pipe” is quite helpful. I need to replace the old path with a different path so I am thinking to use a macro to do the work.

The old one:

filename DIRLIST pipe 'dir "C:\ab\c\*.txt" /b ';

data dirlist ;

infile dirlist lrecl=200 truncover;

input file_name $100.;

run;

I am thinking to define a sas macro like

%let datapath= d:\ce\fi\gh

And then put &datapath to replace the old path. It seems it does not work. Any advice how to define a sas macro to replace old path// no lib is needed

Thank you

Inside the single quotes, macro variables are not resolved, so &datapath will fail inside single quotes. Instead, try this:

filename DIRLIST pipe "dir ""&datapath\*.txt"" /b ";

Re: how to use sas macro to replace a path

Bal23 — Fri, 14 Apr 2017 16:19:15 GMT

Thank you both of you. Yes, it works.