lines {graphics} | R Documentation |
A generic function taking coordinates given in various ways and joining the corresponding points with line segments.
lines(x, ...) ## Default S3 method: lines(x, y = NULL, type = "l", col = par("col"), lty = par("lty"), ...)
x, y |
coordinate vectors of points to join. |
type |
character indicating the type of plotting; actually any of
the type s as in plot . |
col |
color to use. This can be vector of length greater than one, but only the first value will be used for lines (but all will be used for symbols). |
lty |
line type to use. |
... |
Further graphical parameters (see par ) may
also be supplied as arguments, particularly, line width, lwd
and, for type = "b" , pch . |
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.
For type = "h"
, col
can be a vector and will be recycled
as needed.
lwd
can be a vector: its first element will apply to lines but
the whole vector to symbols (recycled as necessary).
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
points
, particularly for type %in% c("p","b","o")
,
plot
,
and the underlying “primitive” plot.xy
.
par
for how to specify colors.
# draw a smooth line through a scatter plot plot(cars, main="Stopping Distance versus Speed") lines(lowess(cars))