st: graph bar, over() with overall mean

[John Marvel <jdmarvel@gmail.com>]

Hi everyone,

Please consider the following the graph, which uses the auto data.


***********
sysuse auto, clear

graph bar (mean) mpg, over(rep78) over(foreign) asyvars nofill legend(off) ///
title("MPG, by Domestic/Foreign  and Repair Record") ytitle("Mean MPG")

*************

As you'll see, the code produces a bar graph with the mean mpg for
each category of the rep78 variable, by each category of the foreign
variable.

My question is: Can I add a bar that represents the overall mean for
each category of the foreign variable?  In other words, in addition to
the five bars shown for the Domestic category, I'd like a sixth bar
that shows the overall mean of the Domestic category.  The same goes
for the Foreign category--I'd like a bar that represents the overall
mean of the Foreign category.


Thanks very much for your help.  (I'm running Stata 13.1 SE).

John Marvel
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