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Create evenly spaced radial tick marks.

Source: R/circular_plotting.R
add_ticks.Rd

Generates a `geom_segment()` layer containing `n` evenly spaced tick marks around the unit circle, each spanning a radial distance of `length` straddling radius 1. The layer can be added to any ggplot.

Usage

add_ticks(
  colour = "black",
  linewidth = 0.5,
  length = 0.1,
  n = 8L,
  color = NULL
)

Arguments

colour, color

Tick colour. Default `"black"`. `color` is the American-spelling alias.

linewidth

Tick line width. Default `0.5`.

length

Radial length of each tick, in data units. Default `0.1`.

n

Number of evenly spaced ticks. Default `8L`.

Value

A `geom_segment()` layer.

Examples

library(ggplot2)
ggplot() +
  coord_fixed() +
  add_ticks()