lattice (version 0.7-1)

tmd: Tukey Mean-Difference Plot

Description

Create Tukey Mean-Difference Plots from a trellis object returned by xyplot and qq

Usage

tmd(object, xlab = "mean", ylab = "difference", ...)

Arguments

object

An object of class ``trellis'' returned by xyplot or qq

xlab

x label

ylab

y label

...

other arguments

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.

synopsis

tmd(object, aspect = "fill", as.table = object$as.table, between = list(x = object$x.between, y = object$y.between), key = object$key, layout = object$layout, main = object$main, page = object$page, panel = panel.tmd, par.strip.text = object$par.strip.text, prepanel = NULL, scales = list(), strip = object$strip, sub = object$sub, xlab = "mean", xlim = NULL, ylab = "difference", ylim = NULL, ..., subscripts = !is.null(groups), subset = TRUE)

Details

The Tukey Mean-difference plot is produced by modifying the (x,y) values of each panel as follows: the new coordinates are given by x=(x+y)/2, y=y-x.

Most arguments given to produce object are transmitted to tmd, with the notable exceptions of aspect and scales. (This behaviour is different from S-Plus.)

See Also

panel.tmd, xyplot, Lattice

Examples

data(singer)
tmd(qqmath(~height|voice.part, data = singer))