st: Stata graph question

["Natarajan Ramachandran" <NRamacha@maxwell.syr.edu>]

Does anyone know how to superimpose a bar chart graph with a line graph using Stata? Specifically, I want to know how to use Stata 8.0 graphs to superimpose a discrete outcome bar chart with its Poisson probability line graph.
 
Any response is very much appreciated.
 
Nat.

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