[R] ggplot2: specifying legend titles

[hadley wickham]

On Fri, Mar 20, 2009 at 9:07 AM, Etches Jacob <jetches at iwh.on.ca> wrote:
> I am trying to specify a legend title to be other than the variable name,
> but I find that the legend splits because scale_shape() takes effect but
> scale_colour() does not.  Can someone spot my error?  Here's some toy code
> that produces the problem on my system (R2.8.1, windows, today's CRAN
> package updates):
>
> library(ggplot2)
> a <- sample(letters[1:5],100,replace=T)
> b <- rnorm(100)
> c <- rnorm(100)
> qplot(b,c,shape=a,colour=a) +
>  scale_colour("Better legend title") +
>  scale_shape("Better legend title")

I'm not sure where scale_colour is coming from - you want
scale_colour_discrete()

Hadley

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