print(my_plot(example_data, ylab.right=expression(e==mc^2)),
position=c(0,0,.95,1))

You will need a recent R version for the ylab.right argument.

On Thu, Mar 3, 2011 at 12:52 PM, Timothy W. Hilton <hilton@meteo.psu.edu>wrote:

> Dear R help list,
>

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