l_layer_polygons: Layer polygons

Description

Loon's displays that are based on Cartesian coordinates (i.e. scatterplot, histogram and graph display) allow for layering visual information including polygons, text and rectangles.

Usage

l_layer_polygons(
  widget,
  x,
  y,
  color = "gray80",
  linecolor = "black",
  linewidth = 1,
  label = "polygons",
  parent = "root",
  index = 0,
  group = NULL,
  active = TRUE,
  ...
)

Value

layer object handle, layer id

Arguments

widget: widget path name as a string
x: list with vectors with x coordinates
y: list with vectors with y coordinates
color: vector with fill colors, if empty string "", then the fill is transparant
linecolor: vector with outline colors
linewidth: vector with line widths
label: label used in the layers inspector
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 objects appear or not (default is TRUE for all).
...: additional state initialization arguments, see l_info_states

Details

For more information run: l_help("learn_R_layer")

Examples

Run this code

if(interactive()){

p <- l_plot()

l <- l_layer_polygons(
     p,
     x = list(c(1,2,1.5), c(3,4,6,5,2), c(1,3,5,3)),
     y = list(c(1,1,2), c(1,1.5,1,4,2), c(3,5,6,4)),
     color = c('red', 'green', 'blue'),
     linecolor = ""
)
l_scaleto_world(p)

l_info_states(l, "color")


# Set groups
p <- l_plot()
l_layer_polygons(p,
                 x = c(1, 2, 1.5, 3, 4, 6, 5, 2, 1, 3, 5, 3),
                 y = c(1, 1, 2, 1, 1.5, 1, 4, 2, 3, 5, 6, 4),
                 group = c(rep(1,3), rep(2,5), rep(3, 4)))
l_scaleto_world(p)

}