mf_grad: Plot graduated symbols

In mapsf: Thematic Cartography

Plot graduated symbols

Description

Plot graduated symbols based on quantitative data.

Usage

mf_grad(
  x,
  var,
  breaks = "quantile",
  nbreaks = 3,
  col = "tomato4",
  border = getOption("mapsf.fg"),
  pch = 21,
  cex,
  lwd,
  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_frame = FALSE,
  leg_adj = c(0, 0),
  leg_size = 1,
  leg_border = border,
  leg_box_cex = c(1, 1),
  leg_fg = getOption("mapsf.fg"),
  leg_bg = getOption("mapsf.bg"),
  leg_frame_border = getOption("mapsf.fg"),
  add = TRUE
)

Arguments

x	object of class sf
var	name(s) of the variable(s) to plot
breaks	either a numeric vector with the actual breaks, or a classification method name (see mf_get_breaks and Details)
nbreaks	number of classes
col	color
border	border color
pch	pch (point type) for symbols
cex	cex (point size) for symbols
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_adj	adjust the postion of the legend in x and y directions
leg_size	size of the legend; 2 means two times bigger
leg_border	symbol border color(s)
leg_box_cex	width and height size expansion of boxes
leg_fg	color of the legend foreground
leg_bg	color of the legend backgournd
leg_frame_border	border color of the legend frame
add	whether to add the layer to an existing plot (TRUE) or not (FALSE)

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].

Value

x is (invisibly) returned.

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_grad(mtq, "POP", pch = 22)

mapsf documentation built on Nov. 21, 2023, 5:09 p.m.