plotArrows

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

methods

spatial

Spherical trigonometry for geographic applications. That is, compute distances and related measures for angular (longitude/latitude) locations.

Robert Hijmans

geosphere

Spherical Trigonometry

Robert J. Hijmans

Charles Karney

Ed Williams

Chris Vennes

plotArrows function

<dl><dt>p</dt>
<dd>Polygons (either a 2 column matrix or data.frame; or a SpatialPolygons* object</dd><dt>fraction</dt>
<dd>numeric between 0 and 1. When smaller then 1, interrupted lines are drawn</dd><dt>length</dt>
<dd>length of the edges of the arrow head (in inches)</dd><dt>first</dt>
<dd>Character to plot on first (and last) vertex</dd><dt>add</dt>
<dd>Logical. If <code>TRUE</code>, the plot is added to an existing plot</dd>
<dt>...</dt>
<dd>Additional arguments, see Details</dd></dl>

Arguments

Author

Plot — plotArrows

<dl>

<dt>p</dt>
<dd>Polygons (either a 2 column matrix or data.frame; or a SpatialPolygons* object</dd>

<dt>fraction</dt>
<dd>numeric between 0 and 1. When smaller then 1, interrupted lines are drawn</dd>

<dt>length</dt>
<dd>length of the edges of the arrow head (in inches)</dd>

<dt>first</dt>
<dd>Character to plot on first (and last) vertex</dd>

<dt>add</dt>
<dd>Logical. If <code>TRUE</code>, the plot is added to an existing plot</dd>


<dt>...</dt>
<dd>Additional arguments, see Details</dd>

</dl>

plotArrows: Plot

Description

Usage

Arguments

Author

Examples