Quantile-Quantile plots for comparing two Distributions
Usage
qq(formula, f.value = NULL, ...)
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
optional function of a single integer (representing
the larger of the two sample sizes), returning a vector of
probabilities corresponding to which quantiles should be
plotted. The typical value for this argument is ppoints,
w
...
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.
qq produces a Q-Q plot of two samples. The default behaviour
of qq is different from the corresponding S-PLUS function. See
the entry for f.value for specifics.
This 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.