[R] adding text to a plot created with strat.plot() from package rioja

[Jason Paul Joines]

     I have a plot created with strat.plot() from package rioja.  When 
the plot is created with scale.percent=FALSE, each x axes is labeled at 
0 and its maximum.  However, when scale.percent=TRUE, the x axes are not 
labeled.  I need to use scale.percent=TRUE and I need labels for the x axes.

     I have been able to add labels to the x axes with mtext but it is 
very tedious to find the correct position.  Is there a better way to do 
this or a better way to find the desired coordinates than trial and error?


Jason
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