How to use ggplot2's geom_dotplot() with both fill and group

Question

I really like the way the ggplot2::geom_dotplot() can nicely stack dots towards the middle of a category but I cannot seem to combine that with a fill color.

Answer 1

If you're open to a bit of a hacky solution just to get it how you want it to look... You can overwrite the fill command by simply providing it with a vector of color names:

tmpData$colorname <- rep(c('red','blue','blue'),2)

ggplot(tmpData, aes(x=x, y=y)) + 
  geom_dotplot(binaxis = "y", stackdir = "center", dotsize=4, fill=tmpData$colorname)

Answer 2

I think you have to add the argument position = "dodge":

 ggplot(tmpData, aes(x = x, y = y, fill = fill,)) +
  geom_dotplot(binaxis = "y", stackdir = "center", dotsize = 4, position = "dodge")