2D density layer

Two-dimensional kernel density estimation with an axis-aligned bivariate normal kernel

l_layer_density2d(
  widget,
  x,
  y,
  h,
  n = 25L,
  lims = NULL,
  color = "black",
  linewidth = 1,
  nlevels = 10,
  levels = NULL,
  label = "density2d",
  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
h	vector of bandwidths for x and y directions. Defaults to normal reference bandwidth (see bandwidth.nrd). A scalar value will be taken to apply to both directions.
n	Number of grid points in each direction. Can be scalar or a length-2 integer vector.
lims	The limits of the rectangle covered by the grid as c(xl, xu, yl, yu).
color	color of each contour
linewidth	the line width
nlevels	number of contour levels desired iff levels is not supplied.
levels	numeric vector of levels at which to draw contour lines.
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

Examples

if(interactive()) {
p <- l_plot(iris, color = iris$Species)
l <- l_layer_density2d(p)
}