ggplot2: expression() in legend labels?

You need to set the labels...

Hadley

On Sat, Sep 24, 2011 at 3:49 AM, Casper Ti. Vector
Is there any way to use expression() in legend labels with ggplot2?

It seems that things like
scale_shape_manual(value = c(
? x = expression(italic(x)),
? y = expression(italic(y))
))
don't work.

Thanks very much :)

--
? ?Using GPG/PGP? Please get my current public key (ID: 0xAEF6A134,
valid from 2010 to 2013) from a key server.

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
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 :|
You need to set the labels...

Using GPG/PGP? Please get my current public key (ID: 0xAEF6A134,
valid from 2010 to 2013) from a key server.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20111004/730ffaf8/attachment.bin>
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
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...
--
? ?Using GPG/PGP? Please get my current public key (ID: 0xAEF6A134,
valid from 2010 to 2013) from a key server.

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.