Problem with colours geom_violin

[Asteinza]

Hi everybody,

Does anybody knwo why I don't get the graphics in the colours I indicate?

(I'm a newbie, thanks for the help ;))

[scottyd22]

Hi @Asteinza. To manually specify colors in ggplot, you need to specify the variable of interest within aes(). Below is an illustration with geom_bar.

library(tidyverse)

# set cyl to character for example
mtcars$cyl = as.character(mtcars$cyl)

# fill specified outside of aes() - all same color
ggplot(mtcars, aes(x=cyl)) + 
  geom_bar(fill='red')

# fill specified within aes - different color for each value of cyl
ggplot(mtcars, aes(x=cyl)) + 
  geom_bar(aes(fill=cyl))

# fill specified within aes and colors of cyl set manually
ggplot(mtcars, aes(x=cyl)) + 
  geom_bar(aes(fill=cyl)) +
  scale_fill_manual(values = c('orange', 'black', 'yellow'))

[Asteinza]

Thank you very much Scott!!!