segments {graphics} | R Documentation |

## Add Line Segments to a Plot

### Description

Draw line segments between pairs of points.

### Usage

segments(x0, y0, x1, y1,
col = par("fg"), lty = par("lty"), lwd = par("lwd"),
...)

### Arguments

`x0, y0` |
coordinates of points **from** which to draw. |

`x1, y1` |
coordinates of points **to** which to draw. |

`col, lty, lwd` |
usual graphical parameters as in
`par` , possibly vectors. `NA` values in `col`
cause the segment to be omitted. |

`...` |
further graphical parameters (from `par` ),
such as `xpd` . |

### Details

For each `i`

, a line segment is drawn between the point
`(x0[i], y0[i])`

and the point `(x1[i], y1[i])`

.

The graphical parameters `col`

, `lty`

and `lwd`

can be
vectors of length greater than one and will be recycled if ncessary.

### References

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

### See Also

`arrows`

,
`polygon`

for slightly easier and less flexible line
drawing, and
`lines`

for the usual polygons.

### Examples

x <- runif(12); y <- rnorm(12)
i <- order(x,y); x <- x[i]; y <- y[i]
plot(x, y, main="arrows(.) and segments(.)")
## draw arrows from point to point :
s <- seq(length(x)-1)# one shorter than data
arrows(x[s], y[s], x[s+1], y[s+1], col= 1:3)
s <- s[-length(s)]
segments(x[s], y[s], x[s+2], y[s+2], col= 'pink')

[Package

*graphics* version 2.2.1

Index]