Boxplot, how to match outliers' color to fill aesthetics?

Question

I am trying to match boxplot\'s outliers color to the fill color which is set by aesthetic (scale_colour_discrete).

Here is an example.

m <- ggplo         


        

Answer 1

I had a very similar issue. I wanted to match style with a previous plot, so wanted black borders with coloured fill, and matching outliers.

My solution was to over-print , once with colour= and the default solid circle point, and once with fill= and an open circle point-shape

p <- ggplot(mtcars, aes(factor(cyl), mpg))
p + geom_boxplot(aes(colour=factor(cyl))) + 
    geom_boxplot(aes(fill=factor(cyl)), outlier.shape=21)

boxplot with coloured fill, and black borders and median line