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

<h2> Condroz Data </h2>

<h3>Description</h3>


<p>Dataset with pH-value and Calcium content in soil samples, collected in different
communities of the Condroz region in Belgium. The data pertain to a
subset of 428 samples with a pH-value between 7.0 and 7.5.
</p>


<h3>Usage</h3>

<pre>data(condroz)</pre>


<h3>Format</h3>


<p>A data frame with 428 observations on the following 2 variables.
</p>

<dl>
<dt><code>Ca</code></dt><dd><p>Calcium content of the soil sample</p>
</dd>
<dt><code>pH</code></dt><dd><p>pH value of the soil sample</p>
</dd>
</dl>



<h3>Details</h3>


<p>For more information on the dataset, cf. Goegebeur et al. (2005).
</p>


<h3>Source</h3>


<p>Hubert and Vandervieren (2006), p. 10.
This dataset is also studied in Vandewalle et al. (2004).
</p>


<h3>References</h3>


<p>Goegebeur, Y., Planchon, V., Beirlant, J., Oger, R. (2005). Quality
Assesment of Pedochemical Data Using Extreme Value Methodology,
Journal of Applied Science, 5, p. 1092-1102.
</p>
<p>Hubert, M. and Vandervieren, E. (2006). An Adjusted Boxplot for
Skewed Distributions, Technical Report TR-06-11, KULeuven, Section
of Statistics, Leuven.
<a href="http://wis.kuleuven.be/stat/robust/Papers/TR0611.pdf">http://wis.kuleuven.be/stat/robust/Papers/TR0611.pdf</a>
</p>
<p>Vandewalle, B., Beirlant, J., Hubert, M. (2004). A robust estimator of
the tail index based on an exponential regression model, in Hubert,
M., Pison G., Struyf, A. and S. Van Aelst, ed., Theory and
Applications of Recent Robust Methods, Birkh√§user, Basel, p. 367-376.
</p>


<h3>Examples</h3>

<pre>
  adjbox(condroz$Ca)
</pre>


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