topic Re: Index function is not working properly with %let statement in SAS Programming

Index function is not working properly with %let statement

jay_q — Fri, 08 Aug 2014 21:30:22 GMT

Please considering following two statements. 2nd data step returns correct index function result but 1st one failed. Any sugguestion to make index function work with %let statement? Many thanks.

%let num=%sysfunc(index('/abc/cde/dev/data/ods','/data'));
%put &num;

data _null_;
num=index('/abc/cde/dev/data/ods','/data');
put num=;
run;

Re: Index function is not working properly with %let statement

ballardw — Fri, 08 Aug 2014 21:43:26 GMT

Try this:

%let num=%index(/abc/cde/dev/data/ods,/data);

%put &num;

The macro processor generally doesn't use the quotes to deal with strings.

Also there are several MACRO language specific string functions you should use instead of working around the differences when using %sysfunc such as %index, %scan, %substr, %trim and variations such as %Kscan %qkscan,%ksubstr, %ktrim

Re: Index function is not working properly with %let statement

Tom — Sat, 09 Aug 2014 05:05:35 GMT

The quotes are considered part of the strings by the macro processor. So there is no match because of the quotes around /data.

See what happens if you try it this way.

%let num=%sysfunc(index(/abc/cde/dev'/data'/ods','/data'));

Re: Index function is not working properly with %let statement

jay_q — Mon, 11 Aug 2014 14:09:52 GMT

Thanks for all your reply. It looks like quotes are not necessary in this case. Both statements work the same below.

%let num=%index(/abc/cde/dev/data/ods,/data);

%put &num;

%let num=%index(/abc/cde/dev/data/ods,/data);

%put &num;

Re: Index function is not working properly with %let statement

jay_q — Mon, 11 Aug 2014 14:11:50 GMT

Hi Tom, thanks for your answer. It worked out great.