mapsf (version 0.11.0)

mf_symb_choro: Plot symbols using choropleth coloration

Description

Plot symbols with colors based on a quantitative data classification.

Usage

mf_symb_choro(
  x,
  var,
  pal = "Mint",
  alpha = 1,
  rev = FALSE,
  breaks = "quantile",
  nbreaks,
  border = getOption("mapsf.fg"),
  pch,
  cex = 1,
  lwd = 0.7,
  pch_na = 4,
  cex_na = 1,
  col_na = "white",
  val_order,
  leg_pos = mf_get_leg_pos(x, 1),
  leg_title = var,
  leg_title_cex = c(0.8, 0.8),
  leg_val_cex = c(0.6, 0.6),
  leg_val_rnd = 2,
  leg_no_data = c("No data", "No data"),
  leg_frame = c(FALSE, 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,
  leg_box_border = getOption("mapsf.fg"),
  leg_box_cex = c(1, 1),
  add = TRUE
)

Value

x is (invisibly) returned.

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]

rev

if pal is a hcl.colors 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 (point type) for symbols

cex

cex (point size) for symbols

lwd

border width

pch_na

pch (point type) for NA values

cex_na

cex (point size) for NA values

col_na

color for missing values

val_order

values order, a character vector that matches var modalities

leg_pos

position of the legend, two of 'topleft', 'top','topright', 'right','bottomright', 'bottom', 'bottomleft', 'left' or a vector of two coordinates in map units (c(x, y)). leg_pos argument can be c('position', 'position'), c('position', x2, y2), c(x1,y1, 'position') or c(x1, y1, x2, y2). Use NA to avoid plotting the legend, use 'interactive' to choose thelegend position interactively.

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)

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

leg_box_border

border color of legend boxes

leg_box_cex

width and height size expansion of boxes

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].

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_map(mtq, c("STATUS", "MED"), "symb_choro")

mf_map(mtq)
mtq$STATUS[30] <- NA
mtq$MED[5] <- NA
mf_map(mtq, c("STATUS", "MED"),
  type = "symb_choro",
  pal = "Reds 3", breaks = "quantile", nbreaks = 4,
  pch = 21:23, cex = c(3, 2, 1),
  pch_na = 25, cex_na = 1.5, col_na = "blue",
  val_order = c(
    "Prefecture",
    "Sub-prefecture",
    "Simple municipality"
  )
)