 radius and its center. The location of the cluster centers isdetermined by the pattern parameter. Three patterns are currentlysupported grid, sine and random.<br/>
 <br/>
 For more information refer to:<br/>
 <br/>
 Tian Zhang, Raghu Ramakrishnan, Miron Livny: BIRCH: An Efficient Data Clustering Method for Very Large Databases. In: ACM SIGMOD International Conference on Management of Data, 103-114, 1996.
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 BibTeX:
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 &#64;inproceedings{Zh