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

`lines(x, …)`# S3 method for default
lines(x, y = NULL, type = "l", …)

x, y

coordinate vectors of points to join.

type

character indicating the type of plotting; actually any of
the `type`

s as in `plot.default`

.

…

Further graphical parameters (see `par`

) may
also be supplied as arguments, particularly, line type, `lty`

,
line width, `lwd`

, color, `col`

and for `type = "b"`

,
`pch`

. Also the line characteristics `lend`

, `ljoin`

and `lmitre`

.

The coordinates can be passed in a plotting structure
(a list with `x`

and `y`

components), a two-column matrix, a
time series, …. See `xy.coords`

. If supplied
separately, they must be of the same length.

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.

`lines.formula`

for the formula method;
`points`

, particularly for `type %in% c("p","b","o")`

,
`plot`

,
and the workhorse function `plot.xy`

.

`abline`

for drawing (single) straight lines.

`par`

for line type (`lty`

) specification and how to
specify colors.

# NOT RUN { # draw a smooth line through a scatter plot plot(cars, main = "Stopping Distance versus Speed") lines(stats::lowess(cars)) # }

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