l_layer_density2d {loon.tourr}

2D density layer

Description

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

Usage

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

As described in grDevices::contourLines: number of contour levels desired iff levels is not supplied.

levels

As described in grDevices::contourLines: 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)
}