mf_label function

Plot labels

Put labels on a map.

mf_label(
  x,
  var,
  col,
  cex = 0.7,
  overlap = TRUE,
  lines = TRUE,
  halo = FALSE,
  bg,
  r = 0.1,
  q = 1,
  ...
)

Arguments

• x: object of class sf
• var: name(s) of the variable(s) to plot
• col: labels color, it can be a single color or a vector of colors
• cex: labels cex, it can be a single size or a vector of sizes
• overlap: if FALSE, labels are moved so they do not overlap.
• lines: if TRUE, then lines are plotted between x,y and the word, for those words not covering their x,y coordinate
• halo: if TRUE, a 'halo' is displayed around the text and additional arguments bg and r can be modified to set the color and width of the halo.
• bg: halo color, it can be a single color or a vector of colors
• r: width of the halo, it can be a single value or a vector of values
• q: quality of the non overlapping labels placement. Possible values are 0 (quick results), 1 (reasonable quality and speed), 2 (better quality), 3 (insane quality, can take a lot of time).
• ...: further text arguments.

Returns

No return value, labels are displayed.

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mtq$cex <- c(rep(.8, 8), 2, rep(.8, 25))
mf_label(
  x = mtq, var = "LIBGEO",
  col = "grey10", halo = TRUE, cex = mtq$cex,
  overlap = FALSE, lines = FALSE
)