legendCirclesSymbols: Legend for Proportional Circles Maps

In cartography: Thematic Cartography

Legend for Proportional Circles Maps

Description

Plot legend for proportional circles maps

Usage

legendCirclesSymbols(
  pos = "topleft",
  title.txt = "Title of the legend",
  title.cex = 0.8,
  cex = 1,
  border = "black",
  lwd = 1,
  values.cex = 0.6,
  var,
  inches,
  col = "#E84923",
  frame = FALSE,
  values.rnd = 0,
  style = "c"
)

Arguments

pos	position of the legend, one of "topleft", "top", "topright", "right", "bottomright", "bottom", "bottomleft", "bottomleftextra", "left" or a vector of two coordinates in map units (c(x, y)).
title.txt	title of the legend.
title.cex	size of the legend title.
cex	size of the legend. 2 means two times bigger.
border	color of the borders.
lwd	width of the borders.
values.cex	size of the values in the legend.
var	vector of values (at least min and max).
inches	radii of the biggest circle.
col	color of symbols.
frame	whether to add a frame to the legend (TRUE) or not (FALSE).
values.rnd	number of decimal places of the values in the legend.
style	either "c" or "e". The legend has two display styles, "c" stands for compact and "e" for extended.

Examples

library(sf)
mtq <- st_read(system.file("gpkg/mtq.gpkg", package="cartography"))
plot(st_geometry(mtq))
box()

propSymbolsLayer(x = mtq, var = "POP",
                 inches = 0.2, legend.pos = "n")

legendCirclesSymbols(pos = "topleft", inches = 0.2,
                     var = c(min(mtq$POP), max(mtq$POP)))
legendCirclesSymbols(pos = "left",
                     var = c(min(mtq$POP), max(mtq$POP)),
                     inches = 0.2, style = "e")
legendCirclesSymbols(pos = "bottomleft",
                     var = c(600, 12000, 40000, max(mtq$POP)),
                     inches = 0.2, style = "c")
legendCirclesSymbols(pos = "topright", cex = 2,
                     var = c(600, 30000,max(mtq$POP)),
                     inches = 0.2, style = "e", frame = TRUE)
legendCirclesSymbols(pos = c(736164.4, 1596658),
                     var = c(min(mtq$POP),max(mtq$POP)),
                     inches = 0.2, frame = TRUE)

cartography documentation built on Sept. 14, 2023, 5:08 p.m.