plotArrows

0th

Percentile

Plot

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

Keywords
methods, spatial
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
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.

Aliases
  • plotArrows
Examples
pol <- rbind(c(-180,-20), c(-160,5), c(-60, 0), c(-160,-60), c(-180,-20))
plotArrows(pol)
Documentation reproduced from package geosphere, version 1.2-15, License: GPL

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