aves are only counted if their logistic model has changed compared to the one of the parent node.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the number of leaves</dd></dl>
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<h4>modelErrors</h4>
<pre>public&nbsp;void&nbsp;modelErrors()
                 throws java.lang.Exception</pre>
<div class="block">Updates the numIncorrectModel field for all nodes. This is needed for calculating the alpha-va