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

[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...

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