create double-headed arrow paths indicating variance

Usage

ob_variance(
  x,
  where = "north",
  theta = 50,
  bend = 0,
  looseness = 1,
  arrow_head = the$arrow_head,
  resect = 2,
  ...
)

Arguments

x: object
where: Location on object. Can be numeric (degrees), degree, radian, turn, or named direction (e.g., "northwest", "east", "below", "left")
theta: angle width
bend: Angle by which the control points are rotated. Can be numeric (degrees), degree, radian, turn, or named direction (e.g., "northwest", "east", "below", "left"). Defaults to 0.
looseness: distance of control points as a ratio of the distance to the object's center (e.g., in a circle of radius 1, looseness = 1.5 means that that the control points will be 1.5 units from the start and end points.)
arrow_head: A 2-column matrix of polygon points
resect: A numeric(1) denoting millimeters or grid::unit to shorten the arrow head and fins.
...: <dynamic-dots> properties passed to style

Value

Returns an object of type ob_bezier

Examples

theta <- degree(seq(0, 360 - 45, 45))
ggdiagram() +
{x <- ob_circle(ob_polar(theta, r = 3))} +
ob_variance(x,
            label = ob_label(LETTERS[seq_along(c(theta))]),
            where = theta,
            looseness = 1.25)