| lines {graphics} | 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, ...)
## Default S3 method:
lines(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 |
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 |
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 in 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))