[R] Change font-face in title

[Gabor Grothendieck]

See ?title where its mentioned that calls are ok and a formula
is a call.  Actually the first ~ is not needed since its already
a formula.

On Tue, Jul 22, 2008 at 1:12 PM, Mike Prager <mike.prager at noaa.gov> wrote:
> "Gabor Grothendieck" <ggrothendieck at gmail.com> wrote:
>>
>> plot(1, type="l", xlab="Wellenlänge [nm]", col="darkslategray",
>>       main = ~ Spektrum ~ italic("Deschampsia caespitosa"))
>
> That clearly works, but why?  Does the tilde cause the rest of
> the text to be parsed as an expression?  This looks extremely
> useful, and I am grasping for the underlying principle.
>
> --
> Mike Prager, NOAA, Beaufort, NC
> * Opinions expressed are personal and not represented otherwise.
> * Any use of tradenames does not constitute a NOAA endorsement.
>
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