Sticky-note

Create the data set. REFLIB.HAT is generated data that produces a symmetric surface pattern, which is useful for illustrating the PLOT statement and its options.

data reflib.hat;
   do x=-5 to 5 by 0.25;
      do y=-5 to 5 by 0.25;
         z=sin(sqrt(x*x+y*y));
         output;
      end;
   end;
run;