Hoja de preparación de datos

data mycas.pistons; label hour='Hour' diameter='Diameter (in cm)'; keep hour diameter; do hour = 1 to 20; do i = 1 to 5; if (hour < 11) then diameter = 5.0 + rannor(1234); else diameter = 5.5 + rannor(1234); output; end; end; run;