Layer polygons

Source: R/l_layer.R

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.

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

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

Value

layer object handle, layer id

Details

For more information run: l_help("learn_R_layer")

See also

l_layer, l_info_states

Examples

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)

}