lattice + plotmath: how to get a variable in bold face?

If you're trying to figure out a way to embolden a Greek letter in
plotmath, it ain't gonna happen. From the plotmath help page:

"Note that bold, italic and bolditalic do not apply to symbols, and
hence not to the Greek symbols such as mu which are displayed in the
symbol font. They also do not apply to numeric constants."

That's why Peter suggested using as.character(N), where N is a number.
That trick obviously won't work for symbols, as noted above.

Dennis

On Thu, Jun 2, 2011 at 3:50 PM, Marius Hofert <m_hofert at web.de> wrote:

Dear all,

How can I get a bold "1000" in the title? I would like to use a variable (as opposed to putting in "1000" directly).

library(lattice)
N <- 1000
xyplot(0~0, xlab.top=list(label=as.expression(bquote(bold("foo" ~ .(N) ~ "bar"))), font=2, cex=1.2))
## => "font=2" is ignored (of course)

Cheers,

Marius