Suppose I have a ggplot with more than one legend.
mov <- subset(movies, length != "")
(p0 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) +
geom_point()
)
I can turn off the display of all the legends like this:
(p1 <- p0 + theme(legend.position = "none"))
Passing show_guide = FALSE
to geom_point
(as per this question) turns off the shape legend.
(p2 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) +
geom_point(show_guide = FALSE)
)
But what if I want to turn off the colour legend instead? There doesn't seem to be a way of telling show_guide
which legend to apply its behaviour to. And there is no show_guide
argument for scales or aesthetics.
(p3 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) +
scale_colour_discrete(show_guide = FALSE) +
geom_point()
)
# Error in discrete_scale
(p4 <- ggplot(mov, aes(year, rating, shape = mpaa)) +
aes(colour = length, show_guide = FALSE) +
geom_point()
)
#draws both legends
This question suggests that the modern (since ggplot2 v0.9.2) way of controlling legends is with the guides
function.
I want to be able to do something like
p0 + guides(
colour = guide_legend(show = FALSE)
)
but guide_legend
doesn't have a show argument.
How do I specify which legends get displayed?
Best Answer
You can use
guide=FALSE
inscale_..._...()
to suppress legend.For your example you should use
scale_colour_continuous()
becauselength
is continuous variable (not discrete).Or using function
guides()
you should setFALSE
for that element/aesthetic that you don't want to appear as legend, for example,fill
,shape
,colour
.UPDATE
Both provided solutions work in new
ggplot2
version 2.0.0 butmovies
dataset is no longer present in this library. Instead you have to use new packageggplot2movies
to check those solutions.