[R] ggplot2: expression() in legend labels?

[Dennis Murphy]

Hi:

Here's a reproducible example:

d <- data.frame(grp = factor(rep(c('x', 'y'), each = 5)),
                 ev = rnorm(10), dv = rnorm(10))
labl <- list(expression(italic('x')), expression(italic('y')))

ggplot(d, aes(x = ev, y = dv, shape = grp)) + geom_point() +
   scale_shape_manual('Group', breaks = levels(d$grp),
                               values = 1:2,
                               labels = labl)

HTH,
Dennis

On Tue, Oct 4, 2011 at 8:59 AM, Casper Ti. Vector
<caspervector at gmail.com> wrote:
> Hmm, that's my fault when composing this mail, but the problem was
> really encountered at that time.
> Nevertheless, neither can I reproduce the problem now, perhaps I just
> made another mistake at that time.
> Thanks all the same, and sorry for the disturbance anyway :|
>
> On Tue, Oct 04, 2011 at 10:10:56AM -0500, Hadley Wickham wrote:
>> You need to set the labels...
>
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