Hi Adolphus,
I'd do it like this:
Do a data step first in which you calculate the statistics that you want to use.
Then do a proc gplot with two variables. To show them both use the symbol statement. Important: the horizontal axis must be the same variable for both statistics (e.g. year or the like).
symbol1 value=diamond interpol=none color=red;
symbol2 vaue=dot interpol=none color=blue;
proc gplot data=mydata;
plot
myverticalvalue1*horizontalvalues
myverticalvalue2*horizontalvalues / overlay;
run;
quit;
If the OVERLAY option were not specified, each plot request would generate a separate graph.
Best regards,
Eva