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.

`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]