geom_circle: Geom for drawing circles in the ggplot2 framework
In geomnet: Network Visualization in the 'ggplot2' Framework

Description Usage Arguments Format Examples

Circles are drawn with a specified radius centered at (x, y). This geom is very much exploratory - we are using it for drawing edges for self references. It is not explored for any more general use, so use with caution!

GeomCircle

geom_circle(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE,
  radius = 0.05,
  ...
)

`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. A `function` can be created from a `formula` (e.g. `~ head(.x, 10)`).
`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. It can also be a named logical vector to finely select the aesthetics to display.
`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()`.
`radius`	numeric value giving the radius of the circle to be drawn (0-1 normalized scale)
`...`	Other arguments passed on to `layer()`. These are often aesthetics, used to set an aesthetic to a fixed value, like `colour = "red"` or `size = 3`. They may also be parameters to the paired geom/stat.

An object of class GeomCircle (inherits from Geom, ggproto, gg) of length 5.

# circles are drawn centered at x and y
library(ggplot2)
data(mpg)
ggplot(mpg, aes(displ, hwy)) + geom_circle(radius=0.1) + geom_point()
ggplot(mpg, aes(displ, hwy)) + geom_circle(linetype=2, radius=0.05, alpha=0.5)
ggplot(mpg, aes(displ, hwy)) + geom_circle(aes(linetype=factor(cyl)), radius=0.05, alpha=0.5)