[R] How to get a degree sign into a lattice factor level?

[Sonam Lodro]

--- Deepayan Sarkar <deepayan at stat.wisc.edu> wrote:
> On Monday 11 November 2002 07:04 pm, Sonam Lodro wrote:
> 
> > I notice that expressions can be used in legends, but as far as I can
> > tell, cannot be used as levels for factors.  I'd like to be able to do
> > something like that so that the levels printed in a lattice plot show
> > the degree character.
> 
> Try something like
> 
> xyplot(rnorm(100) ~ rnorm(100) | gl(2, 50),
>        strip = function(factor.levels, ...) {
>            strip.default(factor.levels = expression(1 * degree, 2 * degree),
>                          ...)
>        })

Thanks for that answer.  Martin's answer which was not so directly related
to my question, nevertheless was even more useful.  The expression approach
is more difficult to make generic for varying length of factor levels.  For
people who don't use Emacs, it's a good approach.

best


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