Layer a hull for loon

Creates a layer which is the subset of points lying on the hull (convex or alpha) of the set of points specified.

l_layer_hull(
  widget,
  x,
  y,
  color = "black",
  linewidth = 1,
  label = "hull",
  parent = "root",
  index = 0,
  group = NULL,
  active = TRUE,
  ...
)

Arguments

widget	`loon` widget path name as a string
x	The coordinates of x. See details
y	The coordinates of y. See details
color	the line color of each hull
linewidth	the line width
label	label used in the layers inspector
parent	parent group layer
index	of the newly added layer in its parent group
group	separate x vector or y vector into a list by group
active	a logical determining whether points appear or not (default is TRUE for all points). If a logical vector is given of length equal to the number of points, then it identifies which points appear (TRUE) and which do not (FALSE).
...	other arguments to modify l_layer_line.

Value

an l_layer widget

Details

Coordinates: the x or y can be a list or a vector.

• If they are vectors, the argument group will be used to set the groups.

• If they are not provided, the x will be inherited from the widget

Examples

if(interactive()) {
p <- l_plot(iris, color = iris$Species)
l <- l_layer_hull(p, group = iris$Species)
}