propTrianglesLayer {cartography}

Double Proportional Triangle Layer

Description

Plot a double proportional triangles layer.

Usage

propTrianglesLayer(
  x,
  spdf,
  df,
  spdfid = NULL,
  dfid = NULL,
  var1,
  col1 = "#E84923",
  var2,
  col2 = "#7DC437",
  k = 0.02,
  legend.pos = "topright",
  legend.title.txt = paste(var1, var2, sep = " / "),
  legend.title.cex = 0.8,
  legend.var1.txt = var1,
  legend.var2.txt = var2,
  legend.values.cex = 0.6,
  legend.values.rnd = 0,
  legend.style = "c",
  legend.frame = FALSE,
  add = TRUE
)

Arguments

x

an sf object, a simple feature collection. If x is used then spdf, df, spdfid and dfid are not.

spdf

a SpatialPointsDataFrame or a SpatialPolygonsDataFrame; if spdf is a SpatialPolygonsDataFrame symbols are plotted on centroids.

df

a data frame that contains the values to plot. If df is missing spdf@data is used instead.

spdfid

name of the identifier variable in spdf, default to the first column of the spdf data frame. (optional)

dfid

name of the identifier variable in df, default to the first column of df. (optional)

var1

name of the first numeric variable to plot, positive values only (top triangle).

col1

color of top triangles.

var2

name of the second numeric variable to plot, positive values only (bottom triangle).

col2

color of bottom triangles.

k

share of the map occupied by the biggest symbol.

legend.pos

position of the legend, one of "topleft", "top", "topright", "left", "right", "bottomleft", "bottom", "bottomright". If legend.pos is "n" then the legend is not plotted.

legend.title.txt

title of the legend.

legend.title.cex

size of the legend title.

legend.var1.txt

label of the top variable.

legend.var2.txt

label of the bottom variable.

legend.values.cex

size of the values in the legend.

legend.values.rnd

number of decimal places of the values displayed in the legend.

legend.style

either "c" or "e". The legend has two display styles, "c" stands for compact and "e" for extended.

legend.frame

boolean; whether to add a frame to the legend (TRUE) or not (FALSE).

add

whether to add the layer to an existing plot (TRUE) or not (FALSE).

See Also

legendPropTriangles

Examples

library(sf)
mtq <- st_read(system.file("gpkg/mtq.gpkg", package="cartography"))
# Employed Active Population 
mtq$OCC <- mtq$ACT-mtq$CHOM
plot(st_geometry(mtq), col = "lightblue4",border = "lightblue3",
     bg = "lightblue1")
propTrianglesLayer(x = mtq, var1 = "OCC", var2 = "CHOM", 
                   col1="green4",col2="red4",k = 0.1)
layoutLayer(title = "Active Population in Martinique, 2015")