geom_jitter {animint2} R Documentation

## Points, jittered to reduce overplotting.

### Description

The jitter geom is a convenient default for geom_point with position = 'jitter'. It's a useful way of handling overplotting caused by discreteness in smaller datasets.

### Usage

geom_jitter(
mapping = NULL,
data = NULL,
stat = "identity",
position = "jitter",
...,
width = NULL,
height = NULL,
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. 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. ... 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. width Amount of vertical and horizontal jitter. The jitter is added in both positive and negative directions, so the total spread is twice the value specified here. If omitted, defaults to 40% of the resolution of the data: this means the jitter values will occupy 80% of the implied bins. Categorical data is aligned on the integers, so a width or height of 0.5 will spread the data so it's not possible to see the distinction between the categories. height Amount of vertical and horizontal jitter. The jitter is added in both positive and negative directions, so the total spread is twice the value specified here. If omitted, defaults to 40% of the resolution of the data: this means the jitter values will occupy 80% of the implied bins. Categorical data is aligned on the integers, so a width or height of 0.5 will spread the data so it's not possible to see the distinction between the categories. na.rm If FALSE (the default), removes missing values with a warning. If TRUE silently removes missing values. 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.

### Aesthetics

geom_pointunderstands the following aesthetics (required aesthetics are in bold):

• x

• y

• alpha

• colour

• fill

• shape

• size

• stroke

geom_point for regular, unjittered points.

### Examples

p <- ggplot(mpg, aes(cyl, hwy))
p + geom_point()
p + geom_jitter()