spiral_arrow: Draw arrows in the spiral direction

In spiralize: Visualize Data on Spirals

Draw arrows in the spiral direction

Description

Draw arrows in the spiral direction

Usage

spiral_arrow(
  x1,
  x2,
  y = get_track_data("ycenter", track_index),
  width = get_track_data("yrange", track_index)/3,
  arrow_head_length = unit(4, "mm"),
  arrow_head_width = width * 2,
  arrow_position = c("end", "start"),
  tail = c("normal", "point"),
  gp = gpar(),
  track_index = current_track_index()
)

Arguments

x1	Start of the arrow.
x2	End of the arrow.
y	Y-location of the arrow.
width	Width of the arrow. The value can be the one measured in the data coordinates or a grid::unit() object.
arrow_head_length	Length of the arrow head.
arrow_head_width	Width of the arrow head.
arrow_position	Position of the arrow. If the value is "end", then the arrow head is drawn at x = x2. If the value is "start", then the arrow head is drawn at x = x1.
tail	The shape of the arrow tail.
gp	Graphical parameters.
track_index	Index of the track.

Value

No value is returned.

See Also

Note spiral_segments() also supports drawing line-based arrows.

Examples

spiral_initialize()
spiral_track()
spiral_arrow(0.3, 0.6, gp = gpar(fill = "red"))
spiral_arrow(0.8, 0.9, gp = gpar(fill = "blue"), tail = "point", arrow_position = "start")

spiralize documentation built on June 22, 2024, 10:45 a.m.