eagles.html

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<html><head><title>R: Foraging Ecology of Bald Eagles</title>
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<table width="100%" summary="page for eagles {MASS}"><tr><td>eagles {MASS}</td><td align="right">R Documentation</td></tr></table>
<h2>Foraging Ecology of Bald Eagles</h2>


<h3>Description</h3>

<p>
Knight and Skagen collected during a field study on the foraging
behaviour of wintering Bald Eagles in Washington State, USA data
concerning 160 attempts by one (pirating) Bald Eagle to steal a chum
salmon from another (feeding) Bald Eagle.
</p>


<h3>Usage</h3>

<pre>
eagles
</pre>


<h3>Format</h3>

<p>
The <code>eagles</code> data frame has 8 rows and 5 columns.
<dl>
<dt><code>y</code></dt><dd>Number of successful attempts.
</dd>
<dt><code>n</code></dt><dd>Total number of attempts.
</dd>
<dt><code>P</code></dt><dd>Size of pirating eagle (<code>L</code> = large, <code>S</code> = small).
</dd>
<dt><code>A</code></dt><dd>Age of pirating eagle (<code>I</code> = immature, <code>A</code> = adult).
</dd>
<dt><code>V</code></dt><dd>Size of victim eagle (<code>L</code> = large, <code>S</code> = small).
</dd></dl>

<h3>Source</h3>

<p>
Knight, R. L. and Skagen, S. K. (1988)
Agonistic asymmetries and the foraging ecology of Bald Eagles.
<EM>Ecology</EM>
<B>69</B>, 1188&ndash;1194.
</p>


<h3>References</h3>

<p>
Venables, W. N. and Ripley, B. D. (1999)
<EM>Modern Applied Statistics with S-PLUS.</EM> Third
Edition. Springer.
</p>


<h3>Examples</h3>

<pre>
eagles.glm &lt;- glm(cbind(y, n - y) ~ P*A + V, data = eagles,
                  family = binomial)
dropterm(eagles.glm)
prof &lt;- profile(eagles.glm)
plot(prof)
pairs(prof)
</pre>



<hr><div align="center">[Package <em>MASS</em> version 7.2-44 <a href="00Index.html">Index]</a></div>

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