trellis.function(
formula,
aspect = "fill",
as.table = FALSE,
between,
data,
groups,
key,
layout,
main,
page,
panel,
par.strip.text,
prepanel,
scales,
skip,
strip = strip.default,
sub,
subscripts,
xlab,
xlim,
ylab,
ylim,
...,
subset)
y ~ x | g1 * g2 * ...
,
indicating that plots of y
versus x
should be produced
conditional on the given variables