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geosphere (version 1.4-3)

plotArrows: Plot

Description

Plot polygons with arrow heads on each line segment, pointing towards the next vertex. This shows the direction of each line segment.

Usage

plotArrows(p, fraction=0.9, length=0.15, first='', add=FALSE, ...)

Arguments

p
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

Examples

Run this code
pol <- rbind(c(-180,-20), c(-160,5), c(-60, 0), c(-160,-60), c(-180,-20))
plotArrows(pol)

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