CODEWITHSUNDEEP
rggplot2legendaesthetics
user2700207
user2700207

Reputation: 2093

Remove 'a' from legend when using aesthetics and geom_text

How can I can remove the letter 'a' from the legend generated by this code? If I remove the geom_text, then the 'a' letter will not show in the legend. I want to keep geom_text, though.

ggplot(data = iris, aes(x = Sepal.Length, y=Sepal.Width, 
                        shape = Species, colour = Species)) + 
   geom_point() + 
   geom_text(aes(label = Species))

Upvotes: 205

Views: 77550

Answers (8)

Jorge Dominguez
Jorge Dominguez

Reputation: 1

In case it helps, even I'm nob.

stat_cor() also needs show.legend=FALSE to avoid "a".

Wasted time for me... ;)

Many thanks for all your contributions

Upvotes: 0

Tom
Tom

Reputation: 87

Building off the top answer. If you only wanted the geom_text() to be visible but have that geom_point() for the purposes of your legend you could set the alpha to 0 making it invisible but override it to 1 in the guides to force it to show.

ggplot(data = iris, aes(x = Sepal.Length, y=Sepal.Width, 
                        shape = Species, colour = Species)) + 
  geom_point(alpha = 0) + 
  geom_text(aes(label = Species)) +
  guides(color = guide_legend(override.aes = aes(label = "", alpha = 1)))

enter image description here

Upvotes: 3

Simon O'Hanlon
Simon O'Hanlon

Reputation: 59970

Set show.legend = FALSE in geom_text:

ggplot(data = iris,
       aes(x = Sepal.Length, y = Sepal.Width, colour = Species,
           shape = Species, label = Species)) + 
    geom_point() +
    geom_text(show.legend = FALSE)

The argument show_guide changed name to show.legend in ggplot2 2.0.0 (see release news).

Pre-ggplot2 2.0.0:

With show_guide = FALSE like so...

ggplot(data = iris, aes(x = Sepal.Length, y = Sepal.Width , colour = Species,
                        shape = Species, label = Species ), size = 20) + 
geom_point() +
geom_text(show_guide  = FALSE)

enter image description here

Upvotes: 255

arranjdavis
arranjdavis

Reputation: 735

I had a similar problem, with an 'a' appearing behind different coloured points I was trying to label with geom_text_repel. To remove the 'a', so that it would just show the point without the 'a' behind it, I had to add show.legend=FALSE as an argument in geom_text_repel.

Hope that makes sense to anyone who might be labouring with the same issue!

Upvotes: 5

R.Andres Castaneda
R.Andres Castaneda

Reputation: 770

You can also use show.legend = FALSE in the arguments of geom_label_repel() to remove the "a" in the legend. So, instead of 

ggplot(d, aes(wt, mpg)) +
  geom_point() +
  theme_classic(base_size = 18) +
  geom_label_repel(
    aes(label = rownames(d), fill = factor(cyl)),
    size = 5, color = "white"
  )+ guides(
  fill = guide_legend(
    title = "Legend Title",
    override.aes = aes(label = "")
  )
)

you can do, 

ggplot(d, aes(wt, mpg)) +
  geom_point() +
  theme_classic(base_size = 18) +
  geom_label_repel(
    aes(label = rownames(d), fill = factor(cyl)),
    size = 5, color = "white",
    show.legend = FALSE  )

Upvotes: 3

Kamil Slowikowski
Kamil Slowikowski

Reputation: 4614

We can use guide_legend(override.aes = aes(...)) to hide the 'a' in the legend.

Below is a short example of how you might use guide_legend()

library(ggrepel)
#> Loading required package: ggplot2

d <- mtcars[c(1:8),]

p <- ggplot(d, aes(wt, mpg)) +
  geom_point() +
  theme_classic(base_size = 18) +
  geom_label_repel(
    aes(label = rownames(d), fill = factor(cyl)),
    size = 5, color = "white"
  )

# Let's see what the default legend looks like.
p


# Now let's override some of the aesthetics:
p + guides(
  fill = guide_legend(
    title = "Legend Title",
    override.aes = aes(label = "")
  )
)

Created on 2019-04-29 by the reprex package (v0.2.1)

Upvotes: 35

Timo Kvamme
Timo Kvamme

Reputation: 2964

Like Nick said

the following code would still produce the error:

geom_text(aes(x=1,y=2,label="",show_guide=F))

enter image description here

whereas:

geom_text(aes(x=1,y=2,label=""),show_guide=F)

outside the aes argument eliminates the a over the legend

enter image description here

Upvotes: 8

Nick
Nick

Reputation: 3134

I had a similar problem. Simon's solution worked for me but a slight twist was required. I did not realise that I need to add "show_guide = F" to geom_text's arguments, rather than replace with it the existing arguments - which is what Simon's solution shows. For a ggplot2 noob like me this was not that obvious. A proper example would have used the OP's code and just added the missing argument like this:

..
geom_text(aes(label=Species), show_guide = F) +
..

Upvotes: 18

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