mf_symb function

Plot symbols

Plot symbols based on qualitative data.

mf_symb(
  x,
  var,
  pal = "Dynamic",
  alpha = 1,
  rev = FALSE,
  border = getOption("mapsf.fg"),
  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,
  leg_frame_border = getOption("mapsf.fg"),
  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
• 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)
• 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)
• leg_frame_border: border color of the legend frame
• 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, "STATUS", "symb")

mtq[6, "STATUS"] <- NA
mf_map(mtq)
mf_map(
  x = mtq, var = "STATUS", type = "symb",
  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
)