Ggplot2: change the background color of one of the legend items
I would like to change the background color for one legend item, but not for the rest. For example using the built-in dataset RToothGrowth
ggplot(ToothGrowth, aes(x=dose,y=len,colour=supp)) + geom_point()
Instead of changing the color of the points themselves, I want to change the background color of the box in the legend from gray to a different color for just one of the legend items. For example, change the background VC
, but not OJ
.
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This is kind of a hack because you are using a package {magick}
, but it gives the desired output:
library(ggplot2)
library(magick)
fig <- image_graph(width = 1000, height = 500, res = 96)
ggplot(ToothGrowth, aes(x=dose,y=len,colour=supp)) +
geom_point()
dev.off()
fig %>%
image_fill("lightblue", point = "+950+220", fuzz = 5)
image_fill()
is the MSPaint equivalent of a paint bucket
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