ggbeeswarm: geom_quasirandom – R documentation

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geom_quasirandom

Points, jittered to reduce overplotting using the vipor package

Description

The quasirandom geom is a convenient means to offset points within categories to reduce overplotting. Uses the vipor package

Usage

geom_quasirandom(mapping = NULL, data = NULL, width = NULL,
  varwidth = FALSE, bandwidth = 0.5, nbins = NULL,
  method = "quasirandom", groupOnX = NULL, dodge.width = 0,
  stat = "identity", position = "quasirandom", na.rm = FALSE,
  show.legend = NA, inherit.aes = TRUE, ...)

Arguments

`mapping`	Set of aesthetic mappings created by `aes` or `aes_`. If specified and `inherit.aes = TRUE` (the default), it is combined with the default mapping at the top level of the plot. You must supply `mapping` if there is no plot mapping.
`data`	The data to be displayed in this layer. There are three options: If `NULL`, the default, the data is inherited from the plot data as specified in the call to `ggplot`. A `data.frame`, or other object, will override the plot data. All objects will be fortified to produce a data frame. See `fortify` for which variables will be created. A `function` will be called with a single argument, the plot data. The return value must be a `data.frame.`, and will be used as the layer data.
`width`	the maximum amount of spread (default: 0.4)
`varwidth`	vary the width by the relative size of each group
`bandwidth`	the bandwidth adjustment to use when calculating density Smaller numbers (< 1) produce a tighter "fit". (default: 0.5)
`nbins`	the number of bins used when calculating density (has little effect with quasirandom/random distribution)
`method`	the method used for distributing points (quasirandom, pseudorandom, smiley or frowney)
`groupOnX`	if TRUE then jitter is added to the x axis and if FALSE jitter is added to the y axis. Prior to v0.6.0, the default NULL causes the function to guess which axis is the categorical one based on the number of unique entries in each. This could result in unexpected results when the x variable has few unique values and so in v0.6.0 the default was changed to always jitter on the x axis unless groupOnX=FALSE. Also consider `coord_flip`.
`dodge.width`	Amount by which points from different aesthetic groups will be dodged. This requires that one of the aesthetics is a factor.
`stat`	The statistical transformation to use on the data for this layer, as a string.
`position`	Position adjustment, either as a string, or the result of a call to a position adjustment function.
`na.rm`	If `FALSE`, the default, missing values are removed with a warning. If `TRUE`, missing values are silently removed.
`show.legend`	logical. Should this layer be included in the legends? `NA`, the default, includes if any aesthetics are mapped. `FALSE` never includes, and `TRUE` always includes.
`inherit.aes`	If `FALSE`, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. `borders`.
`...`	other arguments passed on to `layer`. These are often aesthetics, used to set an aesthetic to a fixed value, like `color = "red"` or `size = 3`. They may also be parameters to the paired geom/stat.

Aesthetics

geom_point understands the following aesthetics (required aesthetics are in bold):

x
y
alpha
colour
fill
group
shape
size
stroke

Examples

ggplot2::qplot(class, hwy, data = ggplot2::mpg, geom='quasirandom')
  # Generate fake data
  distro <- data.frame(
    'variable'=rep(c('runif','rnorm'),each=100),
    'value'=c(runif(100, min=-3, max=3), rnorm(100))
  )
  ggplot2::qplot(variable, value, data = distro, geom = 'quasirandom')
  ggplot2::ggplot(distro,aes(variable, value)) + geom_quasirandom(width=0.1)

ggbeeswarm

Categorical Scatter (Violin Point) Plots

v0.6.0

GPL (>= 2)

Authors

Erik Clarke [aut, cre], Scott Sherrill-Mix [aut]

Initial release

2017-08-03