Hi, I'm new to the SAS and have trouble running this code: data easyway;   do Group = 'Placebo','Active';     do Subj = 1 to 5;       input Score @;       output;     end;   end; datalines; 250 222 230 210 199 166 183 123 129 234 ;   This is an example from Ron Cody's book of "Learning SAS by Example", Program 8-12. Any comments are greatly appreciated. ... View more