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<table width="100%" summary="page for VonBort"><tr><td>VonBort</td><td align="right">R Documentation</td></tr></table>

<h2>Von Bortkiewicz Horse Kicks Data</h2>

<h3>Description</h3>


<p>Data from von Bortkiewicz (1898), given by Andrews \&amp; Herzberg (1985),
on number of deaths by horse or mule kicks in 14 corps of the Prussian
army.
</p>


<h3>Usage</h3>

<pre>
data("VonBort")
</pre>


<h3>Format</h3>


<p>A data frame with 280 observations and 4 variables.
</p>

<dl>
<dt>deaths</dt><dd><p>number of deaths.</p>
</dd>
<dt>year</dt><dd><p>year of the deaths.</p>
</dd>
<dt>corps</dt><dd><p>factor indicating the corps.</p>
</dd>
<dt>fisher</dt><dd><p>factor indicating whether the corresponding corps was
considered by Fisher (1925) or not.</p>
</dd>
</dl>



<h3>Source</h3>


<p>Michael Friendly (2000),
Visualizing Categorical Data:
<a href="http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/vonbort.sas">http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/vonbort.sas</a>
</p>


<h3>References</h3>


<p>D. F. Andrews \&amp; A. M. Herzberg (1985),
<EM>Data: A Collection of Problems from Many Fields for the Student
and Research Worker</EM>.
Springer-Verlag, New York, NY.
</p>
<p>R. A. Fisher (1925),
<EM>Statistical Methods for Research Workers</EM>.
Oliver &amp; Boyd, London.
</p>
<p>L. von Bortkiewicz (1898),
<EM>Das Gesetz der kleinen Zahlen</EM>.
Teubner, Leipzig.
</p>
<p>M. Friendly (2000),
<EM>Visualizing Categorical Data</EM>.
SAS Institute, Cary, NC.
</p>


<h3>See Also</h3>


<p><code>HorseKicks</code> for a popular subsample.
</p>


<h3>Examples</h3>

<pre>
data("VonBort")
## HorseKicks data
xtabs(~ deaths, data = VonBort, subset = fisher == "yes")
</pre>


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