Plot symbols

Plot symbols based on qualitative data.

mf_symb(
  x,
  var,
  pal = "Dynamic",
  alpha = 1,
  border,
  pch,
  cex = 1,
  lwd = 0.7,
  col_na = "grey",
  pch_na = 4,
  cex_na = 1,
  val_order,
  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_no_data = "No data",
  leg_frame = FALSE,
  add = TRUE
)

Arguments

x

object of class sf

var

name(s) of the variable(s) to plot

pal

a set of colors or a palette name (from hcl.colors)

alpha

if pal is a hcl.colors palette name, the alpha-transparency level in the range [0,1]

border

border color

pch

pch (point type) for symbols

cex

cex (point size) for symbols

lwd

border width

col_na

color for missing values

pch_na

pch (point type) for NA values

cex_na

cex (point size) for NA values

val_order

values order, a character vector that matches var modalities

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_no_data

label for missing values

leg_frame

whether to add a frame to the legend (TRUE) or not (FALSE)

add

whether to add the layer to an existing plot (TRUE) or not (FALSE)

Value

x is (invisibly) returned.

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_symb(mtq, "STATUS")


mtq[6, "STATUS"] <- NA
mf_map(mtq)
mf_symb(
  x = mtq, var = "STATUS", pch = c(21:23), pal = c("red1", "tan1", "khaki1"),
  border = "grey20", cex = c(1.5, 1, .9), lwd = .5,
  val_order = c("Prefecture", "Sub-prefecture", "Simple municipality"),
  pch_na = 24, leg_frame = TRUE
)