Bubbleplots

Draws bubbleblots – trivariate plots where the third dimension is mapped to the size of the points drawn on the screen.

Usage

bubbleplot(x, data = NULL, ...)

# S3 method for class 'formula'
bubbleplot(
  x,
  data = NULL,
  maxsize = 3,
  bubblekey = TRUE,
  panel = panel.bubbleplot,
  groups = NULL,
  subset = TRUE,
  drop.unused.levels = lattice.getOption("drop.unused.levels"),
  ...,
  outer,
  allow.multiple
)

Arguments

x

A formula of the form z ~ x * y, where x and y have the usual interpretation in trellis graphics (see lattice::xyplot()) and z is mapped to the size of bubbles.

data

A data.frame, list or environment wherein the formula and groups arguments can be evaluated.

...

Further arguments to pass to lattice::xyplot().

maxsize

Maximum size (in cex) for the bubbles.

bubblekey

Set to TRUE to draw an informative legend about the bubbles. Uses lattice::draw.key(). See the key section of the documentation in lattice::xyplot(). If both auto.key and bubblekey are given and their space arguments (positions) conflict, bubblekey will silently override the position of auto.key.

panel

See lattice::xyplot(). Here, we are passing an additional variable, z, which is then used in panel.bubbleplot().

groups

See lattice::xyplot()

subset

See lattice::xyplot()

drop.unused.levels

See lattice::xyplot()

outer

Ignored.

allow.multiple

Ignored.

Value

An object of class "trellis". The update method can be used to update components of the object and the print method (usually called by default) will plot it on an appropriate plotting device.

Author

Johan Larsson

Examples

bubbleplot(disp ~ hp * wt, groups = cyl, data = mtcars, auto.key = TRUE)

bubbleplot(disp ~ hp * mpg | factor(cyl), groups = gear, data = mtcars,
           auto.key = TRUE)