sunburstTreemap {WeightedTreemaps}

sunburstTreemap

Description

Create sunburst treemaps where variables are encoded by size of circular sectors.

Usage

sunburstTreemap(
  data,
  levels,
  fun = sum,
  sort = TRUE,
  filter = 0,
  cell_size = NULL,
  custom_color = NULL,
  diameter_inner = 0.3,
  diameter_outer = 0.8,
  verbose = FALSE
)

Arguments

data

(data.frame) A data.frame with one column for each hierarchical level

levels

(character) Character vector indicating the column names to be used. The order of names must correspond to the hierarchical levels, going from broad to fine

fun

(function) Function to be used to aggregate cell sizes of parental cells

sort

(logical) Should the columns of the data.frame be sorted before?

filter

(logical) Filter the supplied data frame to remove very small sectors that may not be visible. The default is to not remove any sectors.

cell_size

(character) The name of the column used to control sector size. Can be one of levels or any other column with numerical data. NA or values equal or less than zero are not allowed. The values in this column are aggregated by the function specified by fun. If sector_size = NULL, sector size is simply computed by the number of members for the respective sector (corresponding to rows in the data.frame).

custom_color

(character) An optional column that can be specified to control cell color. Cell colors are determined when drawing the treemap using drawTreemap, but the default is to use one of levels or cell size. Any other data source that shall be used instead has to be included in the treemap generation and explicitly specified here. The default value is NULL.

diameter_inner

(numeric) The minimum inner diameter of the drawn map. Defaults to 0.3,

diameter_outer

(numeric) The maximum outer diameter of the drawn map. Defaults to 0.8

verbose

(logical) If verbose is TRUE (default is FALSE), basic information such as a success message is printed to the console.

Details

This function returns a treemap object instead of a plot. In order to actually draw the treemap, use drawTreemap.

Value

'sunburstTreemap' returns an object of the formal class 'sunburstResult'. It is essentially a list of objects related to the graphical representation of the treemap (polygons, labels, cell data) as well as data from the call of the function. It contains the following slots:

cells

'list' of polygons for drawing a treemap

data

'data.frame', the original data that was supplied to calling 'voronoiTreemap'

call

'list' of arguments used to call 'voronoiTreemap'

See Also

drawTreemap for drawing the treemap.

Examples

# load example data
data(mtcars)
mtcars$car_name = gsub(" ", "\n", row.names(mtcars))

# generate treemap;
# by default cell (sector) size is encoded by number of members per group
tm <- sunburstTreemap(
  data = mtcars,
  levels = c("gear", "cyl"),
  cell_size = "hp"
)

# draw treemap with default options
drawTreemap(tm,
  title = "A sunburst treemap",
  legend = TRUE,
  border_size = 2,
  layout = c(1, 3),
  position = c(1, 1)
)

# use custom color palette
drawTreemap(tm,
  title = "Use custom palette",
  legend = TRUE,
  color_palette = rep(c("#81E06E", "#E68CFF", "#76BBF7"), c(3, 4, 5)),
  border_size = 2,
  label_level = 2,
  label_size = 0.7,
  label_color = grey(0.5),
  layout = c(1, 3),
  position = c(1, 2),
  add = TRUE
)

# color cells (sectors) based on cell size
drawTreemap(tm,
  title = "Coloring encoded by cell size",
  color_type = "cell_size",
  legend = TRUE,
  color_palette = rev(heat.colors(10)),
  border_size = 3,
  border_color = grey(0.3),
  label_level = 1,
  label_size = 2,
  label_color = grey(0.5),
  layout = c(1, 3),
  position = c(1, 3),
  add = TRUE
)