Details
Note: Autocall macros are included in a library supplied by SAS. This library might not
be installed at your site or might be a site-specific version. If you cannot access this
macro or if you want to find out if it is a site-specific version, see your on-site SAS
support personnel. For more information, see “Storing and Reusing Macros” on page
115.
The TRIM macro and the QTRIM macro both trim trailing blanks. If the argument
contains a special character or mnemonic operator, listed below, use %QTRIM.
QTRIM produces a result with the following special characters and mnemonic operators
masked so that the macro processor interprets them as text instead of as elements of the
macro language:
& % ' " ( ) + − * / < > = ¬ ∘ ~ ; , # blank
AND OR NOT EQ NE LE LT GE GT IN
Examples
Example 1: Removing Trailing Blanks
In this example, the TRIM autocall macro removes the trailing blanks from a message
that is written to the SAS log.
%macro numobs(dsn);
%local num;
data _null_;
set &dsn nobs=count;
call symput('num', left(put(count,8.)));
stop;
run;
%if &num eq 0 %then
%put There were NO observations in %upcase(&dsn).;
%else
%put There were %trim(&num) observations in %upcase(&dsn).;
%mend numobs;
%numobs(sample)
Invoking the NUMOBS macro generates the following statements:
DATA _NULL_;
SET SAMPLE NOBS=COUNT;
CALL SYMPUT('num', LEFT(PUT(COUNT,8.)));
STOP;
RUN;
If the data set Sample contains six observations, then the %PUT statement writes this
line to the SAS log:
There were 6 observations in SAMPLE.
Example 2: Contrasting %TRIM and %QTRIM
These statements are executed January 28, 1999:
%let date=%nrstr( &sysdate );
%put *&date* *%qtrim(&date)* *%trim(&date)*;
The %PUT statement writes this line to the SAS log:
%TRIM and %QTRIM Autocall Macro 193