Plot symbols — mf_map

mf_map() can use symbols to display qualitative data, using symb map type.

For polygons, centroids are used to plot graduated symbols. This map type is not available for lines.

Usage

For polygons and points:

mf_map(x, var, type = "symb",
       pch, cex = 2, lwd = 0.7, pal, rev = FALSE, border,
       val_order,
       col_na = "grey", pch_na = 4, cex_na = 1,
       alpha, expandBB, extent, bg, add = TRUE, leg_*)

Arguments

x: object of class sf (polygons or points)
var: name of the variable to map
type: "symb"
pch: a vector of types of symbols, see pch. The length of pch should match the number of modalities.
cex: a vector of sizes for symbols. The length of cex should match the number of modalities.
lwd: border width of symbols
pal: a set of colors (hex codes) or a palette name. Palette names can be obtained with hcl.pals. The default palette is the pal_quali palette (see mf_theme).
rev: if pal is a palette name, whether the ordering of the colors should be reversed (TRUE) or not (FALSE)
border: border color for symbols, a hex code or color name given by colors. The default color is the background color (see mf_theme).
val_order: modalities order in the legend, a character vector that matches var modalities. Default to alphabetic order of modalities.
pch_na: type of symbol for missing values, see pch
cex_na: size of symbol for missing values
col_na: color for missing values, a hex code or a color name given by colors

Value

x is (invisibly) returned.

Examples

mtq <- mf_get_mtq()
mtq$STATUS[3] <- NA
mf_map(mtq)
mf_map(mtq, "STATUS", "symb",
  pal = "Berlin", border = "white", lwd = 1,
  cex = c(4, 3, 2), pch = c(21:23), col_na = "red",
  val_order = c("Prefecture", "Sub-prefecture", "Simple municipality"),
  leg_title = ""
)