Update method for objects of class
"trellis", and a way to retrieve the last printed trellis object (that was saved).
## S3 method for class 'trellis': update((object, panel, aspect, as.table, between, key, auto.key, legend, layout, main, page, par.strip.text, prepanel, scales, skip, strip, strip.left, sub, xlab, ylab, xlab.top, ylab.right, xlim, ylim, xscale.components, yscale.components, axis, par.settings, plot.args, lattice.options, index.cond, perm.cond, ...)) ## S3 method for class 'trellis': t((x)) ## S3 method for class 'trellis': x[(i, j, ..., drop = FALSE) trellis.last.object(..., prefix)]
- object, x
- The object to be updated, of class
- i, j
- indices to be used. Names are not currently allowed.
- logical, whether dimensions with only one level are to be dropped. Currently ignored, behaves as if it were
- panel, aspect, as.table, between, key, auto.key, legend, layout,
main, page, par.strip.text, prepanel, scales, skip, strip,
strip.left, sub, xlab, ylab, xlab.top, ylab.right, xlim, ylim,
xscale.components, yscale.components, axis, par.settings, plot.args,
lattice.options, index.cond, perm.cond, ...
- arguments that will be used to update
object. See details below.
- A character string acting as a prefix identifying the plot of a
"trellis"object. Only relevant when a particular page is occupied by more than one plot. Defaults to the value appropriate for the last
"trellis"object printed. See
All high level lattice functions such as
xyplot produce an object of (S3) class
"trellis", which is usually displayed by its
update method, and then re-displayed as needed.
Most arguments to high level functions can also be supplied to the
update method as well, with some exceptions. Generally speaking, anything that would needs to change the data within each panel is a no-no (this includes the
formula, data, groups, subscripts and
subset). Everything else is technically game, though might not be implemented yet. If you find something missing that you wish to have, feel free to make a request.
Not all arguments accepted by a Lattice function are processed by
update, but the ones listed above should work. The purpose of these arguments are described in the help page for
xyplot. Any other argument is added to the list of arguments to be passed to the
panel function. Because of their somewhat special nature, updates to objects produced by
wireframe do not work very well yet.
"[" method is a convenient shortcut for updating
t method is a convenient shortcut for updating
perm.cond in the special (but frequent) case where there are exactly two conditioning variables, when it has the effect of switching (‘transposing’) their order.
The print method for
"trellis" objects optionally saves the object after printing it. If this feature is enabled,
trellis.last.object can retrieve it. By default, the last object plotted is retrieved, but if multiple objects are plotted on the current page, then others can be retrieved using the appropriate
prefix argument. If
trellis.last.object is called with arguments, these are used to update the retrieved object before returning it.
An object of class
trellis, by default plotted by
NULL is no saved object is available.
spots <- by(sunspots, gl(235, 12, labels = 1749:1983), mean) old.options <- lattice.options(save.object = TRUE) xyplot(spots ~ 1749:1983, xlab = "", type = "l", scales = list(x = list(alternating = 2)), main = "Average Yearly Sunspots") update(trellis.last.object(), aspect = "xy") trellis.last.object(xlab = "Year") lattice.options(old.options)
Documentation reproduced from package lattice, version 0.20-15. License: GPL (>= 2)