tm_chart: Legend charts

In tmap: Thematic Maps

Legend charts

Description

Legend charts are small charts that are added to the map, usually in addition to legends.

Usage

tm_chart_histogram(
  breaks,
  plot.axis.x,
  plot.axis.y,
  extra.ggplot2,
  position,
  width,
  height,
  stack,
  z,
  group.frame,
  resize_as_group
)

tm_chart_bar(
  plot.axis.x,
  plot.axis.y,
  extra.ggplot2,
  position,
  width,
  height,
  stack,
  z,
  group.frame,
  resize_as_group
)

tm_chart_donut(position, width, height, stack, z, group.frame, resize_as_group)

tm_chart_violin(
  position,
  width,
  height,
  stack,
  z,
  group.frame,
  resize_as_group
)

tm_chart_box(position, width, height, stack, z, group.frame, resize_as_group)

tm_chart_none()

tm_chart_heatmap(
  position,
  width,
  height,
  stack,
  z,
  group.frame,
  resize_as_group
)

Arguments

breaks	The breaks of the bins (for histograms)
plot.axis.x, plot.axis.y	Should the x axis and y axis be plot?
extra.ggplot2	Extra ggplot2 code
position	Position of the chart. An object created with tm_pos_in() or tm_pos_out(). Or, as a shortcut, a vector of two values, specifying the x and y coordinates. The first is "left", "center" or "right" (or upper case, meaning tighter to the map frame), the second "top", "center" or "bottom". Numeric values are also supported, where 0, 0 means left bottom and 1, 1 right top. See also vignette about positioning.
width	in number of text lines (height of it)
height	in number of text lines
stack	stack with other map components, either "vertical" or "horizontal".
z	stacking order
group.frame	group.frame
resize_as_group	resize_as_group

Details

Note that these charts are different from charts drawn inside the map. Those are called glyphs (to be implemented).

See Also

Vignette about charts

Examples

tm_shape(World) +
  tm_polygons("HPI",
    fill.scale = tm_scale_intervals(),
    fill.chart = tm_chart_histogram())

tmap documentation built on April 4, 2025, 2:05 a.m.