[R] Plotting in the margin

[Christopher Adolph]

Hi,

I would like to place a line (tilted at an angle) in the margin of an R
plot.  Is there any way to place such an annotation outside the plotting
area?

As an alternative, being able to plot a rotated character (the pipe, |) in
the margin would be sufficient.  The problem is that mtext doesn't work
with the srt option.

As a further alternative, if I could put a legend in the margin, I could
use the text command within the legend, and then srt would work (I've
checked, and text("|",srt=x) seems to work for various values of x besides
multiples of 90).  But I don't know how to put a legend in the margin
either.

Does anyone see how to make any of these approaches work?  Or perhaps
there is yet another alternative?

Thanks,

Chris Adolph

Dept. of Government
Harvard University


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