geom_arc: Arcs
In Clement-Viguier/ggvis:

Description Usage Arguments Examples

View source: R/geom_arc.R

'geom_arc' draws an arc of center (x, y), with a custom radius, angle and width. Couyld be useful for custom data visualisation, or distribution or vector fields. For those scenarios it's more convenient than geom-segment.

geom_arc(mapping = NULL, data = NULL, stat = "identity",
  position = "identity", ..., arrow = NULL, arrow.fill = NULL,
  lineend = "butt", linejoin = "round", res = pi/20, reverse = T,
  relative = F, normalise = F, na.rm = FALSE, show.legend = NA,
  inherit.aes = TRUE)

`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. The geom_arc is characterised by specific aes that encore different dimensions: 'radius' is explicit, 'width': the length of the arc, 'angle': the position of the arc and 'start' [0-1] the relative position of the starting point of the arc (0.5 by default).
`arrow`	specification for arrow heads, as created by arrow().
`arrow.fill`	fill colour to use for the arrow head (if closed). 'NULL' means use 'colour' aesthetic.
`lineend`	Line end style (round, butt, square).
`linejoin`	Line join style (round, mitre, bevel).
`res`	angular resolution of the arc tracing, in radiant.
`reverse`	change the direction of the arc to be clockwise (TRUE by default because the calculation is based on the trigonometric positive direction that is anti-clockwise)
`relative`	if TRUE makes the 'width' aes() angular instead of linear (FALSE by default).
`relative`	if TRUE normalize the circle width relative to the maximum value of width to avoid overlapping (default = F).

1	iris %>% ggplot(aes(Sepal.Length , Petal.Length, colour = Species)) + geom_arc(width = 0.8, aes(angle = Petal.Width ,radius = 0.1*Sepal.Width)) + coord_fixed()