Help with array not working (want to divide a series of variables by 12)

[fieldsa83]

I have bw1-bw1000 and i want to make a new version of each that is divided by 12

Made a data step and put this array, but it is not working:

do i=1 to 1000; 

newbw[i]=bw[i]/12;

end;  

Any ideas why?

[Tom · Accepted solution]

You didn't include the whole data step so it is hard to tell.

data want ;
  set have ;
  array newbw (1000) ;
  array bw (1000) ;
  do i=1 to 1000; 
    newbw[i]=bw[i]/12;
  end;  
run;

The code above assumes that you have 1,000 numeric variables named BW1 to BW1000 and you want to create 1000 new variables named NEWBW1 to NEWBW1000.

[fieldsa83]

OK thanks, was not aware I had to define both bw and newbw 

[ballardw]

You need to get into the habit of reading the log.

Your code would have generated something like:

ERROR: Undeclared array referenced: newbw.

ERROR: Variable newbw has not been declared as an array.

Telling you exactly what the issue was.