Deprecated - Plot a choropleth map — mf

This function is deprecated. Please use mf_map() with type = "choro" instead.

Plot a choropleth map

Usage

mf_choro(
  x,
  var,
  pal,
  alpha = NULL,
  rev = FALSE,
  breaks = "quantile",
  nbreaks,
  border,
  pch = 21,
  cex = 2,
  lwd = 0.7,
  col_na = "white",
  extent = x,
  bg,
  expandBB = rep(0.04, 4),
  leg_pos = mf_get_leg_pos(x),
  leg_title = var,
  leg_title_cex = 0.8,
  leg_val_cex = 0.6,
  leg_val_rnd = 2,
  leg_val_dec = ".",
  leg_val_big = "",
  leg_no_data = "No data",
  leg_frame = FALSE,
  leg_horiz = FALSE,
  leg_adj = c(0, 0),
  leg_size = 1,
  leg_box_border,
  leg_box_cex = c(1, 1),
  leg_fg,
  leg_bg,
  leg_frame_border,
  add = FALSE
)

Arguments

x: object of class sf
var: name(s) of the variable(s) to plot
pal: a set of colors (hex codes) or a palette name (valid palette names can be obtained with hcl.pals).
alpha: opacity, in the range 0,1
rev: if pal is a valid palette name, whether the ordering of the colors should be reversed (TRUE) or not (FALSE)
breaks: either a numeric vector with the actual breaks, or a classification method name (see mf_get_breaks and Details)
nbreaks: number of classes
border: border color
pch: pch type of pch if x is a POINT layer
cex: cex cex of the symbols if x is a POINT layer
lwd: border width
col_na: color for missing values
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)). Use NA to avoid plotting the legend, use 'interactive' to choose the legend position by clicking on the map.
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_val_dec: decimal separator
leg_val_big: thousands separator
leg_no_data: label for missing values
leg_frame: whether to add a frame to the legend (TRUE) or not (FALSE)
leg_horiz: display the legend horizontally (for proportional symbols and choropleth types)
leg_adj: adjust the position of the legend in x and y directions
leg_size: size of the legend; 2 means two times bigger
leg_box_border: border color of legend boxes
leg_box_cex: width and height size expansion of boxes
leg_fg: color of the legend foreground
leg_bg: color of the legend background
leg_frame_border: border color of the legend frame
add: whether to add the layer to an existing plot (TRUE) or not (FALSE)

Value

x is (invisibly) returned.

Details

Breaks defined by a numeric vector or a classification method are left-closed: breaks defined by c(2, 5, 10, 15, 20) will be mapped as [2 - 5[, [5 - 10[, [10 - 15[, [15 - 20]. The "jenks" method is an exception and has to be right-closed. Jenks breaks computed as c(2, 5, 10, 15, 20) will be mapped as [2 - 5], ]5 - 10], ]10 - 15], ]15 - 20].

Examples

mtq <- mf_get_mtq()
mf_map(mtq, var = "MED", type = "choro")


mtq[6, "MED"] <- NA
mf_map(
  x = mtq, var = "MED", type = "choro",
  col_na = "grey", pal = "Cividis",
  breaks = "quantile", nbreaks = 4, border = "white",
  lwd = .5, leg_pos = "topleft",
  leg_title = "Median Income", leg_title_cex = 1.1,
  leg_val_cex = 1, leg_val_rnd = -2, leg_no_data = "No data",
  leg_frame = TRUE
)