     <a href="../../../../weka/core/DistanceFunction.html" title="interface in weka.core">DistanceFunction</a>&nbsp;distanceFunction)
                         throws java.lang.Exception</pre>
<div class="block">Calculates the radius of a node based on its two 
 child nodes (if merging two nodes).</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>child1</code> - The first child of the node.</dd><dd><code>child2</code> - The second child of the node.</dd><dd><code>pivot</code> - The centre/p