ggviolin: Violin plots.

In heike/ggboxplots: Variations of Boxplots in ggplot2

Description

Create a violin plot within the ggplot2 framework. The code for calculating violins is based on the vioplot 0.2 package.

Usage

ggviolin(data, x, y, bandwidth, alpha = 0.5, fill = "grey60", ...)

Arguments

data	dataset
x	factor variable
y	values
bandwidth	value for kernel density
alpha	parameter for alpha blending
fill	color or symbol to fill in violins.
...	other parameters

Details

The idea of a violin plot is, that additionally to the boxes of a boxplot, two density curves are plotted opposing each other, and the space between them is filled to create the shape of a 'violin'. As for any density estimation, a bandwidth parameter is used to control smoothness. Violin plots have been introduced by hintze.

Value

ggplot2 layer of violins

Author(s)

Heike Hofmann

References

Hintze, J. L. and R. D. Nelson (1998). Violin plots: a box plot-density trace synergism. The American Statistician, 52(2):181-4.

Examples

require(ggplot2)
data(diamonds)
ggviolin(diamonds, color, price, bandwidth=500)
ggviolin(diamonds, cut, price, bandwidth=300, fill=cut) + scale_fill_brewer(palette="Set1")

heike/ggboxplots documentation built on May 17, 2019, 3:23 p.m.