A 'ggplot2' geom to add text labels to treemap tiles.

Source: R/geom_treemap_text.R

geom_treemap_text() can be used to add a text label to each tile in a treemap created with geom_treemap().

geom_treemap_text(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  na.rm = FALSE,
  show.legend = FALSE,
  inherit.aes = TRUE,
  padding.x = grid::unit(1, "mm"),
  padding.y = grid::unit(1, "mm"),
  place = "topleft",
  min.size = 4,
  grow = FALSE,
  reflow = FALSE,
  fixed = NULL,
  layout = "squarified",
  start = "bottomleft",
  ...
)

Arguments

mapping, data, stat, position, na.rm, show.legend, inherit.aes, ...

Standard geom arguments as for ggplot2::geom_text().
padding.x, padding.y

grid::unit() object, giving horizontal or vertical padding between text and edge of tile. Defaults to 1 mm.
place

Where inside the box to place the text. Default is 'bottom'; other options are 'topleft', 'top', 'topright', etc.
min.size

Minimum font size, in points. If provided, text that would need to be shrunk below this size to fit the box will not be drawn. Defaults to 4 pt.
grow

If TRUE, text will be grown as well as shrunk to fill the box.
reflow

If TRUE, text will be reflowed (wrapped) to better fit the box.
fixed

Deprecated. Use layout = "fixed" instead. Will be removed in later versions.
layout

The layout algorithm, one of either 'squarified' (the default), 'scol', 'srow' or 'fixed'. See Details for full details on the different layout algorithms.
start

The corner in which to start placing the tiles. One of 'bottomleft' (the default), 'topleft', 'topright' or 'bottomright'.

Details

geom_treemap_text() requires area and label aesthetics. Several other standard 'ggplot2' aesthetics are supported (see Aesthetics).

geom_treemap_text() uses the 'ggfittext' package to fit text to tiles. All text drawing options available in ggfittext::geom_fit_text() (growing, reflowing, etc.) are also available here. For full details on how these options work, see the documentation for ggfittext::geom_fit_text().

The layout argument is used to set the treemap layout algorithm. All 'treemapify' geoms added to a plot should have the same value for layout and start, or they will not share a common layout (see geom_treemap() for details on the layout algorithms).

Aesthetics

  • area (required)

  • label (required)

  • subgroup, subgroup2 or subgroup3

  • colour

  • size

  • alpha

  • family

  • fontface

  • angle

See also

geom_treemap()

Examples


ggplot2::ggplot(G20, ggplot2::aes(area = gdp_mil_usd,
                                  fill = econ_classification,
                                  label = country)) +
  geom_treemap() +
  geom_treemap_text()