I was looking here but I can't figure it out.
How can I change the word "type" to something else?
+ labs(colour = "legend title")
to your ggplot call. Great resource site is also google group for ggplot2.
edit: this assumes that colour is the aesthetic in the legend, e.g.
qplot(x,y,colour=z). If another aesthetic is being shown in the legend, use that as the argument instead, e.g.
+ labs(fill = "legend title") for a raster/image plot.
More generally, if you specify an explicit scale such as
scale_colour_continuous, you can set the
scale_name argument (warning: the details of the arguments to scales may have changed in recent releases of
ggplot2; this description is of version 0.9.2.1).