CODEWITHSUNDEEP
rggplot2
ks_18
ks_18

Reputation: 35

Scatterplot fill doesn't change in ggplot2 even when specified

I am trying to assign a single color for all points on a scatter plot in ggplot2. However, no matter what color I set fill = to, the points always end up being black.

Here is my code (with dummy variables):

ggplot(data = testDF) +
    geom_point(aes(x = testDF$X, y = testDF$Y), 
    fill = "#2EC4B6", color = "#E71D36") # Fill is cyan, color is red

This is what the plot looks like:

https://i.sstatic.net/4nRHo.png

Upvotes: 2

Views: 2262

Answers (2)

mikeck
mikeck

Reputation: 3788

You need to set the dot style with pch=21. Default dot style does not use fill.

EDIT actual example:

ggplot(data = testDF) +
  geom_point(aes(x = X, y = Y),          # testDF has columns X and Y
  fill = "#2EC4B6", color = "#E71D36",   # Fill is cyan, color is red
  pch = 21)                              # point style that uses both color and fill

As @Artem pointed out, you can also use the shape aesthetic to change the dot style. I don't know exactly what the difference between pch and shape is, but I think pch is from older versions of ggplot2.

Upvotes: 4

Artem Sokolov
Artem Sokolov

Reputation: 13731

The default shape used by geom_point does not have a fill aesthetic. You can address this by changing the shape parameter:

ggplot( mtcars, aes( x = wt, y = mpg ) ) +
    geom_point( shape = 21, fill = "#2EC4B6", color = "#E71D36" )

enter image description here

Upvotes: 4

Related Questions