This is not an error in R but in your X11 fonts setup. It is R reporting
your configuration problem to you.
What dpi is your screen? If more than 75dpi (very likely these days), do
you have 100dpi fonts installed and in your path? We have seen that
configuration mistake cause this on SuSe be
Full_Name: roger newton
Version: 2.1.1
OS: SuSe linux 9.2
Submission from: (NULL) (80.176.228.157)
> data(trees)
> plot(trees)
Error in text.default(x, y, txt, cex = cex, font = font) :
X11 font at size 16 could not be loaded
Attempting to plot dataframe trees fails with error message
