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 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	Graphics 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 Aug. 9, 2022, 5:09 p.m.