st: graph bar - how to add 'external' label above stacked bar chart

[Vianney <vbrandicourt@gmail.com>]

Dear STATA users,


I am trying to create a stacked bar chart that graphs 2 volumes (say
variables 'A' & 'B'), but that also includes a label on top of each
bar. This label, however, is neither variable `A' nor `B', but a third
piece of information, 'C'

Specifically, it would appear that the option blabel() is not
appropriate here, as my variable 'C' is NOT:

* the bar height
* the cumulative bar height
* the name of yvar
* the name of the first over() group

> It's actually a percentage value that is in my dataset, where C = (B/(A+B))
> How would I modify the STATA command below to add 'C' as a label on top of each stacked bar?

#delimit ;
graph bar (sum) A B, over(yearnum) over(country) stack
;
#delimit cr


Many thanks for your help!

Best,
Vianney
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