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<html><head><title>R: Describe arrows to add to a line.</title>
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<table width="100%" summary="page for arrow {grid}"><tr><td>arrow {grid}</td><td align="right">R Documentation</td></tr></table>
<h2>Describe arrows to add to a line.</h2>
<h3>Description</h3>
<p>
Produces a description of what arrows to add to a line.
The result can be passed to a function that draws a line,
e.g., <code>grid.lines</code>.
</p>
<h3>Usage</h3>
<pre>
arrow(angle = 30, length = unit(0.25, "inches"),
ends = "last", type = "open")
</pre>
<h3>Arguments</h3>
<table summary="R argblock">
<tr valign="top"><td><code>angle</code></td>
<td>
The angle of the arrow head in degrees (smaller numbers
produce narrower, pointier arrows). Essentially describes
the width of the arrow head.</td></tr>
<tr valign="top"><td><code>length</code></td>
<td>
A unit specifying the length of the arrow head (from tip
to base).</td></tr>
<tr valign="top"><td><code>ends</code></td>
<td>
One of <code>"last"</code>, <code>"first"</code>, or <code>"both"</code>,
indicating which ends of the line to draw arrow heads.</td></tr>
<tr valign="top"><td><code>type</code></td>
<td>
One of <code>"open"</code> or <code>"closed"</code> indicating
whether the arrow head should be a closed triangle.</td></tr>
</table>
<h3>Examples</h3>
<pre>
arrow()
</pre>
<hr><div align="center">[Package <em>grid</em> version 2.5.1 <a href="00Index.html">Index]</a></div>
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