Dot cartogram — bt_dotcartogram • bertin

Dot cartogram

Usage

bt_dotcartogram(
  bertin,
  data,
  onedot,
  nbmax = 200,
  iteration = 200,
  values,
  radius = 4,
  span = 0.5,
  fill,
  stroke = "white",
  strokeWidth = 0.5,
  fillOpacity = 1,
  tooltip,
  display = TRUE,
  leg_x,
  leg_y,
  leg_fill = "none",
  leg_stroke = "black",
  leg_strokeWidth = 0.8,
  leg_txtcol = "#363636",
  leg_title = values,
  leg_round,
  leg_fontSize = 10
)

Arguments

bertin: map object
data: sf object EPSG:4326
onedot: dot value (if onedot is filled, nbmax is useless)
nbmax: number max of circles on the map
iteration: an integer to define the number of iteration for the Dorling method
values: a string corresponding to the targeted variable in the properties
radius: radius of dots
span: spacing between dots
fill: fill color
stroke: stroke color
strokeWidth: stroke width
fillOpacity: fill opacity
tooltip: tooltip allows you to display a label when you fly over an object
display: Boolean to allow to show or hide the layer. This parameter has no effect on the calculation of the extent
leg_x: position in x (if this value is not filled, the legend is not displayed)(value in px)
leg_y: position in y (if this value is not filled, the legend is not displayed)(value in px)
leg_fill: color of the circles
leg_stroke: stroke color of the circles
leg_strokeWidth: stoke-width of the legend
leg_txtcol: color of the text
leg_title: title of the legend
leg_round: number of digits after the decimal point
leg_fontSize: legend title font size

Value

a map object

Examples

library(sf)
world <- st_read(system.file("gpkg/world.gpkg", package = "bertin"),
                 layer = "world", quiet = TRUE)
bt_layer(data = world, fill = "#808080") |>
  bt_dotcartogram(data = world,
                  onedot = 100000000000,
                  iteration = 200, values = "gdp") |>
  bt_draw()