| qq {lattice} | R Documentation |
Quantile-Quantile plots for comparing two Distributions
qq(formula, f.value = ppoints, ...)
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, which divide the values of
x into two groups. Quantiles for these groups will be plotted
along the two axes.
|
f.value |
function of a single integer (representing sample size), returning a vector of probabilities corresponding to which quantiles should be plotted. |
... |
Other arguments |
These and all other high level Trellis functions have several
arguments in common. These are extensively documented only in the
help page for xyplot, which should be consulted to learn more
detailed usage.
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.
Deepayan Sarkar deepayan@stat.wisc.edu
data(singer) qq(voice.part ~ height, aspect = 1, data = singer, subset = (voice.part == "Bass 2" | voice.part == "Tenor 1"))