Data A; 
    DO i = 1 to 200; 
	 X = 10 + 3*normal(123); 
	 Y = 2 + 15*X - X*X + 6*normal(12345); 
	 output;  end;
	 proc gplot; 
	 plot Y*X=1 Y*X=2 Y*X=3 Y*X=1; 
	 symbol1 v=none i=join c=red; 
	 symbol2 v=star i=rq c=green; 
	 symbol3 v=dot i=spline c=blue; 	 
	 data next; set a; XR=round(X);
     proc sort; by X;   * For smooth and spline *; 
	 proc gplot; plot Y*XR=1 Y*X=2 Y*X=3; 
	 symbol1 V=star i=boxt; ** No color specified **; 
	 symbol2 v=plus i=smooth20 c=purple; 
	 run; quit;