Introduction to ggskewboxplots

What is `ggskewboxplots`?

The package provides alternative boxplots that help better visualize the skewness and asymmetry in data distributions by using different lower and upper whisker calculations than the classic boxplot.

Installation and Loading

Since you are developing locally, load the package using:

library(ggskewboxplots)

Basic Usage

Here is an example of drawing alternative boxplots of hwy by class in the mpg dataset:

library(ggplot2)

## Warning: package 'ggplot2' was built under R version 4.3.3

library(ggskewboxplots)

ggplot(mpg, aes(x = class, y = hwy)) +
  geom_skewboxplot(method = "walker")

Methods

You can choose from the following whisker calculation methods by setting the method argument in geom_skewboxplot():

Method	Description
`"tukey"`	Classic Tukey boxplot
`"kimber"`	Kimber’s modified method
`"hubert"`	Hubert’s median-based skewness method
`"adil"`	Combination of skewness and median center
`"babura"`	Bowley’s coefficient method (variant 1)
`"walker"`	Bowley’s coefficient method (variant 2)
`"junsawang"`	Bowley coefficient alternative method

Additional Parameters

k: Tuning parameter for whisker length (default is 1.5). For example:

ggplot(mpg, aes(x = class, y = hwy)) +
  geom_skewboxplot(method = "adil", k = 2)

Example: Comparing Different Methods

library(gridExtra)

p1 <- ggplot(mpg, aes(x = class, y = hwy)) + geom_skewboxplot(method = "tukey") + ggtitle("Tukey")
p2 <- ggplot(mpg, aes(x = class, y = hwy)) + geom_skewboxplot(method = "kimber") + ggtitle("Kimber")
p3 <- ggplot(mpg, aes(x = class, y = hwy)) + geom_skewboxplot(method = "hubert") + ggtitle("Hubert")

gridExtra::grid.arrange(p1, p2, p3, ncol = 1)