Polygons (either a 2 column matrix or data.frame; or a SpatialPolygons* object
fraction
numeric between 0 and 1. When smaller then 1, interrupted lines are drawn
length
length of the edges of the arrow head (in inches)
first
Character to plot on first (and last) vertex
add
Logical. If TRUE, the plot is added to an existing plot
...
Additional arguments, see Details
Note
Based on an example in Software for Data Analysis by John Chambers (pp 250-251) but adjusted such that the line segments follow great circles between vertices.
Author(s)
Robert J. Hijmans
Examples
pol <- rbind(c(-180,-20), c(-160,5), c(-60, 0), c(-160,-60), c(-180,-20))
plotArrows(pol)