x = 3.5 
 y2 = 3.1  x = 2.5 
 y2 = 1.1  x = 1.5 
 y2 = 1.3  x = 0.5 
 y2 = 3.1  x = 3.5 
 y1 = 2  x = 2.5 
 y1 = 0.5  x = 1.5 
 y1 = 2.8  x = 0.5 
 y1 = 1
The SGPlot Procedure



 x = 3.5 
 y = 3.1 
 groupvar = 2  x = 3.5 
 y = 2 
 groupvar = 1  x = 2.5 
 y = 1.1 
 groupvar = 2  x = 2.5 
 y = 0.5 
 groupvar = 1  x = 1.5 
 y = 1.3 
 groupvar = 2  x = 1.5 
 y = 2.8 
 groupvar = 1  x = 0.5 
 y = 3.1 
 groupvar = 2  x = 0.5 
 y = 1 
 groupvar = 1
The SGPlot Procedure