Map component: manual legend — tm_add

Map component that adds a manual legend.

Usage

tm_add_legend(
  ...,
  labels = "",
  type = "symbols",
  title = "",
  design = NULL,
  orientation = NULL,
  group = NA,
  group.control = "check",
  resize.as.group = FALSE,
  z = NA_integer_
)

Arguments

...: visual variables and arguments passed on to tm_legend(). By default, the argument type is set to "symbols", which means that the supported visual variables are: "fill", "col", "shape", "size", "fill_alpha", "col_alpha", "lty", "lwd", "linejoin", and "lineend". The number of legend items will be equal to the maximum number of specific values (and specified labels.)
labels: labels by default "" (so omitted)
type: the layer type from which the visual variables (see ...) are taken. Options: "symbols" (default), "lines", "polygons", and "text".
title: text of the title
design: legend design
orientation: legend orientation
group: Name of the group to which this layer belongs. This is only relevant in view mode, where layer groups can be switched (see group.control)
group.control: In view mode, the group control determines how layer groups can be switched on and off. Options: "radio" for radio buttons (meaning only one group can be shown), "check" for check boxes (so multiple groups can be shown), and "none" for no control (the group cannot be (de)selected).
resize.as.group: resize.as.group
z: z