These prepanel functions are used as fallback defaults in various high level plot functions in Lattice. These are rarely useful to normal users but may be helpful in developing new displays.
prepanel.default.bwplot(x, y, horizontal, nlevels, origin, stack, ...)
prepanel.default.histogram(x, breaks, equal.widths, type, nint, ...)
prepanel.default.qq(x, y, ...)
prepanel.default.xyplot(x, y, type, subscripts, groups, ...)
prepanel.default.cloud(perspective, distance,
                       xlim, ylim, zlim,
                       screen = list(z = 40, x = -60),
                       R.mat = diag(4),
                       aspect = c(1, 1), panel.aspect = 1,
                       ..., zoom = 0.8)
prepanel.default.levelplot(x, y, subscripts, ...)
prepanel.default.qqmath(x, f.value, distribution, qtype,
                        groups, subscripts, ..., tails.n = 0)
prepanel.default.densityplot(x, darg, groups, weights, subscripts, ...)
prepanel.default.parallel(x, y, z, ..., horizontal.axis)
prepanel.default.splom(z, ...)A list with components xlim, ylim, dx and
dy, and possibly xat and yat, the first two being
  used to calculate panel axes limits, the last two for banking
  computations.  The form of these components are described in the help
  page for xyplot.
x and y values, numeric or factor
logical, applicable when one of the variables is to be treated as categorical (factor or shingle).
logical indicating whether the
    parallel axes should be laid out horizontally (TRUE) or
    vertically (FALSE).
number of levels of such a categorical variable.
for barcharts or the type="h" plot type
details of histogram
    calculations.  type has a different meaning in
    prepanel.default.xyplot (see panel.xyplot)
See xyplot.  Whenever
    appropriate, calculations are done separately for each group and
    then combined.
numeric vector of weights for the density
    calculations.  If this is specified, it is subsetted by
    subscripts to match it to x.
see panel.cloud
see panel.qqmath
list of arguments passed to density
see panel.parallel and panel.pairs
type of quantile
other arguments, usually ignored
Deepayan Sarkar Deepayan.Sarkar@R-project.org
xyplot, banking, Lattice.
  See documentation of corresponding panel functions for more details
  about the arguments.