yosukesabai - 3 months ago 25

R 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 <- ggplot(movies, aes(y = votes, x = factor(round(rating)),`

fill=factor(Animation)))

m + geom_boxplot() + scale_y_log10()

This generates plot below. How do I change those black dots to be reddish/greenish colors used in the body? outlier.colour option of the boxplot seems to pick one colour across, and not as aesthetic, if I understand correctly. I dont mind using colour aesthetics if that helps.

Adapted this solution (Changing whisker definition in geom_boxplot). The horizontal dodging is reset by stats_summary and I couldn't figure out how to get it back. I'd ptobably drop outliers and stretch whiskers as needed since I know how now.

`# define the summary function`

f <- function(x) {

r <- quantile(x, probs = c(0.05, 0.25, 0.5, 0.75, 0.95))

names(r) <- c("ymin", "lower", "middle", "upper", "ymax")

r

}

# define outlier function, beyound 5 and 95% percentiles

o <- function(x) {

subset(x, x < quantile(x,probs=c(0.05))[1] | quantile(x,probs=c(0.95))[1] < x)

}

m <- ggplot(movies, aes(y = votes, x = factor(round(rating)),

colour=factor(Animation)))

m <- m + stat_summary(fun.data=f, geom='boxplot')

m <- m + stat_summary(fun.y=o, geom='point', aes(colour=factor(Animation)))

m + scale_y_log10()

Answer

As @koshke said, having the outliers colored like the lines of the box (not the fill color) is now easily possible by setting `outlier.colour = NULL`

:

```
m <- ggplot(movies, aes(y = votes, x = factor(round(rating)),
colour = factor(Animation)))
m + geom_boxplot(outlier.colour = NULL) + scale_y_log10()
```

`outlier.colour`

must be written with "ou"`outlier.colour`

must be outside`aes ()`

*I'm posting this as a late answer because I find myself looking this up again and again, and I also posted it for the related question Coloring boxplot outlier points in ggplot2?.*