Hi Baptiste,

You need to use the symbol("\nnn") concept, where nnn denotes the octal
symbol number. For < it's 074 and for > it's 076. This little test seemed to
work:

plot(1, 1, main = expression(symbol("\074")~'x, y'~symbol("\076")))

HTH,
Dennis

On Sat, Sep 11, 2010 at 10:01 AM, baptiste auguie <
baptiste.auguie@googlemail.com> wrote:

> What do people use to show angle brackets < > in R graphics? Have I
> missed something obvious?
>
> Thanks,
>
> baptiste
>
> On 9 September 2010 17:57, baptiste auguie
> <baptiste.auguie@googlemail.com> wrote:
> > Dear list,
> >
> > I read in ?plotmath that I can use bgroup to draw scalable delimiters
> > such as [ ] and ( ). The same technique fails with < > however, and I
> > cannot find a workaround,
> >
> > grid.text(expression(bgroup("<",atop(x,y),">")))
> >
> > Error in bgroup("<", atop(x, y), ">") : invalid group delimiter
> >
> > Regards,
> >
> > baptiste
> >
> > sessionInfo()
> > R version 2.11.1 (2010-05-31)
> > x86_64-apple-darwin9.8.0
> >
> > locale:
> > [1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
> >
> > attached base packages:
> > [1] grid      stats     graphics  grDevices utils     datasets
> > methods   base
> >
> > other attached packages:
> > [1] TeachingDemos_2.7
> >
> > loaded via a namespace (and not attached):
> > [1] tools_2.11.1
> >
>
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> PLEASE do read the posting guide
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>

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