lattice (version 0.3-1)

qq: Quantile-Quantile Plots of Two Samples

Description

Quantile-Quantile plots for comparing two Distributions

Usage

qq(formula, f.value = ppoints, ...)

Arguments

formula

formula of the form y ~ x | g1 * g2 * ..., where x must be a numeric, and y can be a factor, shingle, character or numeric vector, with the restriction that there must be exactly two levels of y

f.value

function of a single integer (representing sample size), returning a vector of probabilities corresponding to which quantiles should be plotted.

...

Other arguments

Value

• An object of class trellis, by default plotted by print.trellis.

synopsis

qq(formula, data = parent.frame(), aspect = "fill", layout = NULL, panel = panel.qq, prepanel = NULL, scales = list(), strip = TRUE, groups = NULL, xlab, xlim, ylab, ylim, f.value = ppoints, ..., subscripts = !is.null(groups), subset = TRUE)

See Also

trellis.args, panel.qq, Lattice

Examples

data(singer)
qq(voice.part ~ height, aspect = 1, data = singer,
   subset = (voice.part == "Bass 2" | voice.part == "Tenor 1"))