Dot plot of numeric variable, either using raw values or binned,
optionally classified by a factor. Dot plots are useful for visualizing the
distribution of a numeric variable in a small data set.
Usage
Dotplot(x, by, bin = FALSE, breaks, xlim,
xlab = deparse(substitute(x)))
Value
Returns NULL invisibly.
Arguments
x
a numeric variable.
by
optionally a factor (or character or logical variable) by which to classify x.
bin
if TRUE (the default is FALSE), the values of x are binned,
as in a histogram, prior to plotting.
breaks
breaks for the bins, in a form acceptable to the hist function;
the default is "Sturges".
xlim
optional 2-element numeric vector giving limits of the horizontal axis.
xlab
optional character string to label horizontal axis.
If the by argument is specified, then one dot plot is produced for each
level of by; these are arranged vertically and all use the same scale
for x. An attempt is made to adjust the size of the dots to the space
available without making them too big.