topic Re: uninitialized in SAS Programming

uninitialized

Ronein — Sun, 15 Dec 2024 09:22:54 GMT

Hello

Is it possible to tell SAS to give error when "uninitialized".

For example:

I want to get error here and I even dont see warning

Data have;
X=10;
run;

data want;
y=z*5;
Run;

Re: uninitialized

PaigeMiller — Sun, 15 Dec 2024 10:31:41 GMT

What is the problem here? You can search the log for "uninitialized", just like you can search the log for "ERROR".

Re: uninitialized

sbxkoenk — Sun, 15 Dec 2024 11:50:56 GMT

Use the PUTLOG statement to write errors, warning, and notes to the SAS log - The DO Loop

I produce a WARNING for your case ... but you need an input dataset (set statement) in your data step to make it work !

data have;
x=10;
run;

/* The macro %VAREXIST checks to see if a specific variable exists on a specified data set. */
%macro varexist(dsn=class,varname=age); 
%local dsid vnum;
%let vnum=0;
%let dsid = %sysfunc(open(&dsn));
%if &dsid %then %do;
   %let vnum = %sysfunc(varnum(&dsid,&varname));
   %let dsid = %sysfunc(close(&dsid)); 
%end;
&vnum
%mend varexist; 

data want;
 set have;
%if %varexist(dsn=have,varname=x)^=0 %then %do; 
   putlog "NOTE: x-variable is IN input dataset"; 
%end;
%if %varexist(dsn=have,varname=x) %then %do; 
 y=x*5;
%end;
run;

data want;
 set have;
%if %varexist(dsn=have,varname=z)=0 %then %do; 
   putlog "WARNING: z-variable NOT IN input dataset"; 
%end;
%if %varexist(dsn=have,varname=z) %then %do; 
 y=z*5;
%end;
run;
/* end of program */

Ciao, Koen

Re: uninitialized

Quentin — Sun, 15 Dec 2024 12:23:38 GMT

You can use the VARINITCHK system option, and set it to ERROR (or WARN if you only want a warning):

1    options varinitchk=error;
2
3    data want;
4    y=z*5;
5    Run;

ERROR: Variable z is uninitialized.
NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WORK.WANT may be incomplete.  When this step was stopped there were 0 observations and 2 variables.
WARNING: Data set WORK.WANT was not replaced because this step was stopped.

Re: uninitialized

Ronein — Sun, 15 Dec 2024 22:34:18 GMT

I prefer that program make error and stop execute in such situation. I might miss it by looking at log