tes a new instance of a DBSCANClusterer.
 <p>
 The euclidean distance will be used as default distance measure.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>eps</code> - maximum radius of the neighborhood to be considered</dd><dd><code>minPts</code> - minimum number of points needed for a cluster</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/exception/NotPositiveException.html" title="class in org.apache.commons.math3.e