Plot proportional symbols

With the prop map type, mf_map() displays symbols (squares or circles) with areas proportional to a quantitative variable (stocks).

For polygons, centroids are used to plot proportional symbols.

Usage

For polygons and points:

mf_map(x, var, type = "prop",
       inches = 0.3, val_max, symbol, col, border, lwd,
       expandBB, extent, bg, alpha, add = FALSE, leg_*)

For lines:

mf_map(x, var, type = "prop",
       val_max, lwd_max = 20, col,
       expandBB, extent, bg, alpha, add = FALSE, leg_*)

Arguments

x

object of class sf

var

name of the variable to map

type

"prop"

inches

size of the largest symbol in inches (radius for circles, half width for squares)

val_max

maximum value corresponding to the largest symbol or line

lwd_max

width of the largest line

symbol

type of proportional symbols, either "circle" or "square"

col

color of the proportional symbols or lines, a hex code or a color name given by colors. The default color is the highlight color (see mf_theme).

border

border color for proportional symbols, a hex code or color name given by colors. The default color the background color (see mf_theme).

lwd

border width of proportional symbols

alpha, expandBB, extent, bg, add

arguments described in mf_map

leg_*

legend arguments described in mf_map

Value

x is (invisibly) returned.

See also

mf_map()

Examples

mtq <- mf_get_mtq()
flows <- mf_get_mtq("lines")
mtq <- mf_get_mtq()
mf_map(mtq)
mf_map(mtq, "POP", "prop",
  inches = .4, leg_title = "Population",
  leg_pos = "topright"
)
mf_map(flows, "fij", "prop",
  lwd_max = 10, col = "steelblue2",
  leg_pos = "right"
)