lines {base}

R Documentation

Add Connected Line Segments to a Plot

Description

A generic function taking coordinates given in various ways and joining the corresponding points with line segments.

Usage

lines(x, ...)
lines.default(x, y=NULL, type="l", col=par("col"), lty=par("lty"), ...)

Arguments

x, y	coordinate vectors of points to join.
type	character indicating the type of plotting; actually any of the types as in plot.
col	color to use. This can be vector of length greater than one, but only the first value will be used.
lty	line type to use.
...	Further graphical parameters (see par) may also be supplied as arguments, particularly, line type, lty and line width, lwd.

Details

The coordinates can be passed to lines in a plotting structure (a list with x and y components), a time series, etc. See xy.coords.

The coordinates can contain NA values. If a point contains NA it either its x or y value, it is omitted from the plot, and lines are not drawn to or from such points. Thus missing values can be used to achieve breaks in lines.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth \& Brooks/Cole.

See Also

points, plot, and the underlying “primitive” plot.xy.

par for how to specify colors.

Examples

data(cars)
# draw a smooth line through a scatter plot
plot(cars, main="Stopping Distance versus Speed")
lines(lowess(cars))

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