arrows {graphics} | R Documentation |

Draw arrows between pairs of points.

arrows(x0, y0, x1, y1, length = 0.25, angle = 30, code = 2, col = par("fg"), lty = par("lty"), lwd = par("lwd"), ...)

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

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

`length` |
length of the edges of the arrow head (in inches). |

`angle` |
angle from the shaft of the arrow to the edge of the arrow head. |

`code` |
integer code, determining kind of arrows to be
drawn. |

`col, lty, lwd` |
graphical parameters, possible vectors.
`NA` values in `col` cause the arrow to be omitted. |

`...` |
graphical parameters such as `xpd` and the line
characteristics `lend` , `ljoin` and `lmitre` :
see `par` . |

For each `i`

, an arrow is drawn between the point ```
(x0[i],
y0[i])
```

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

.

If `code=1`

an arrowhead is drawn at `(x0[i],y0[i])`

and if
`code=2`

an arrowhead is drawn at `(x1[i],y1[i])`

. If
`code=3`

a head is drawn at both ends of the arrow. Unless
`length = 0`

, when no head is drawn.

The graphical parameters `col`

, `lty`

and `lwd`

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

The direction of a zero-length arrow is indeterminate, and hence so is the direction of the arrowheads. To allow for rounding error, arrowheads are omitted (with a warning) on any arrow of length less than 1/1000 inch.

The first four arguments in the comparable S function are named
`x1,y1,x2,y2`

.

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

`segments`

to draw segments.

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 2.5.0 Index]