[R] [GGPLOT] Legends at different layers

hadley wickham h.wickham at gmail.com
Mon Dec 7 20:38:01 CET 2009


You mean:

dat <- data.frame(x = rnorm(100))
dat1 <- data.frame(
  x = c(0,0),
  y = c(1,0),
  Label = c("Point1", "Point2")
)


ggplot(dat, aes(x)) +
  geom_histogram(aes(fill = ..count..)) +
  geom_point(aes(x, y, colour = Label), data = dat1, size = 4) +
  scale_fill_gradient("Count", low = "green", high = "red")


Unfortunately not.  In the future, you will be able to do +
scale_colour_discrete(legend = F)

Hadley

On Mon, Dec 7, 2009 at 11:17 AM, Megh <megh700004 at yahoo.com> wrote:
>
> Here I have following code :
>
> dat = rnorm(100)
> ggplot() + geom_histogram(aes(dat, fill=..count..)) +
> scale_fill_gradient("Count", low="green", high="red") +
> opts(legend.position="none")
> # Above is without any legend
>
> ## Now I want to place two points with legends
> dat1 <- data.frame(c(0,0), c(1,0)); Label <- c("Point1", "Point2")
> last_plot() + geom_point(aes(dat1[,1], dat1[,2], colour=Label), size=4)
> # Here I am not getting any legend for "points"
>
> I want GGPLOT should show the legend for "points" NOT for "histogram". Is
> there any option?
>
> Thanks,
>
> --
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