[R] plot math Q: How to "plot" hat(f') ?

[Martin Maechler]

In nonparametric regression and density estimation, something like
 \hat{f'}(x)  [LaTeX]  is very natural.
In all S dialects,
   hat(f')
is invalid syntax, and hence one cannot use something like
   plot(1, main = expression(hat(f')))

I can say something like

   plot(1, main = expression(widehat(paste(f, "'"))), cex.main = 3)

but that (the R code, not the plot result) is a bit ugly.
Nicer solutions are welcome...


Martin Maechler <maechler at stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO D10	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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