mf_prop function

Plot proportional symbols

Plot proportional symbols.

mf_prop(
  x,
  var,
  inches = 0.3,
  val_max,
  lwd_max = 20,
  symbol = "circle",
  col = "tomato4",
  border = getOption("mapsf.fg"),
  lwd = 0.7,
  leg_pos = mf_get_leg_pos(x),
  leg_title = var,
  leg_title_cex = 0.8,
  leg_val_cex = 0.6,
  leg_val_rnd = 0,
  leg_frame = FALSE,
  leg_frame_border = getOption("mapsf.fg"),
  leg_horiz = FALSE,
  leg_adj = c(0, 0),
  leg_fg = getOption("mapsf.fg"),
  leg_bg = getOption("mapsf.bg"),
  leg_size = 1,
  add = TRUE
)

Arguments

• x: object of class sf
• var: name(s) of the variable(s) to plot
• inches: size of the biggest symbol (radius for circles, half width for squares) in inches.
• val_max: maximum value used for proportional symbols
• lwd_max: line width of the largest line
• symbol: type of symbols, 'circle' or 'square'
• col: color
• border: border color
• lwd: border width
• leg_pos: position of the legend, one of 'topleft', 'top','topright', 'right', 'bottomright', 'bottom', 'bottomleft', 'left' or a vector of two coordinates in map units (c(x, y)). If leg_pos = NA then the legend is not plotted. If leg_pos = 'interactive' click onthe map to choose the legend position.
• leg_title: legend title
• leg_title_cex: size of the legend title
• leg_val_cex: size of the values in the legend
• leg_val_rnd: number of decimal places of the values in the legend
• leg_frame: whether to add a frame to the legend (TRUE) or not (FALSE)
• leg_frame_border: border color of the legend frame
• leg_horiz: display the legend horizontally (for proportional symbols and choropleth types)
• leg_adj: adjust the postion of the legend in x and y directions
• leg_fg: color of the legend foreground
• leg_bg: color of the legend backgournd
• leg_size: size of the legend; 2 means two times bigger
• add: whether to add the layer to an existing plot (TRUE) or not (FALSE)

Returns

x is (invisibly) returned.

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_map(mtq, "POP", "prop")

mf_map(mtq)
mf_map(
  x = mtq, var = "POP", type = "prop",
  inches = .4, symbol = "circle", val_max = 90000,
  col = "tomato1", border = "blue", lwd = 1,
  leg_pos = "right", leg_title = "Population",
  leg_title_cex = 1, leg_val_cex = .8, leg_val_rnd = 0,
  leg_frame = TRUE, add = TRUE
)