| plot.formula {base} | R Documentation |
Formula Notation for Scatterplots
Description
Specify a scatterplot or add points or lines via a formula.
Usage
plot.formula(formula, ..., data = parent.frame(), subset,
ylab = varnames[response], ask = TRUE)
points.formula(formula, ..., data = parent.frame(), subset)
lines.formula(formula, ..., data = parent.frame(), subset)
plot(y ~ x, ...)
points(y ~ x, ...)
lines(y ~ x, ...)
Arguments
formula |
a |
data |
a data.frame (or list) from which the variables in
|
subset |
an optional vector specifying a subset of observations to be used in the fitting process. |
ylab |
the y label of the plot(s) |
... |
Further graphical parameters may also be passed as
arguments, see |
.
ask |
logical, see |
Details
Both the terms in the formula and the ... arguments are
evaluated in data enclosed in parent.frame() if
data is a list or a data frame. The terms of the formula and
those arguments in ... that are of the same length as
data are subjected to the subsetting specified in
subset. If the formula in plot.formula contains more
than one non-response term, a series of plots of y against each term
is given. A plot against the running index can be specified as
plot(y~1).
If y is an object (ie. has a class attribute)
then plot.formula looks for a plot method for that class first.
Value
These functions are invoked for their side effect of drawing in the active graphics device.
See Also
plot.default, plot.factor.
Examples
data(airquality)
op <- par(mfrow=c(2,1))
plot(Ozone ~ Wind, data = airquality, pch=as.character(Month))
plot(Ozone ~ Wind, data = airquality, pch=as.character(Month),
subset = Month != 7)
par(op)