This help topic is for R version 0.90. For the current version of R, try https://stat.ethz.ch/R-manual/R-patched/library/base/html/plotfactor.html
plot.factor {base}R Documentation

Plotting factor variables

Description

This functions implements a “scatterplot” method for factor arguments of the generic plot function. Actually, boxplot or barplot are used when appropriate.

Usage

plot.factor(x, y, legend.text = levels(y), ...)

Arguments

x, y

numeric or factor. y may be missing.

legend.text

a vector of text used to construct a legend for the plot. Only used if y is present and a factor.

...

Further arguments to plot, see also par.

See Also

plot.default, plot.formula, barplot, boxplot.

Examples

data(PlantGrowth)
plot(PlantGrowth)                                # -> plot.data.frame
plot(weight ~ group, data = PlantGrowth)         # numeric vector ~ factor
plot(cut(weight, 2) ~ group, data = PlantGrowth) # factor ~ factor

plot(PlantGrowth$group, axes=FALSE, main="no axes")# extremly silly
[Package base version 0.90 ]