boxplot.formula {base} | R Documentation |
Produces side by side boxplots from a number of vectors, using formula notation.
boxplot.formula(formula, data = NULL, subset, na.action, ...)
formula |
a formula, such as y ~ x . |
data |
a data.frame (or list) from which the variables in
formula should be taken. |
subset |
an optional vector specifying a subset of observations to be used in the fitting process. |
na.action |
a function which indicates what should happen when
the data contain NA s. |
... |
further arguments to the default boxplot method and
graphical parameters may also be passed as arguments, see
boxplot.default and par . |
This is a method of the generic function boxplot
. It
operates by setting up the data from the formula specification, and
then calling boxplot.default
.
See the help for boxplot.default
.
data(OrchardSprays) boxplot(decrease ~ treatment, data = OrchardSprays, log = "y", col = "bisque")