Clustering is a 2 part process - calculate scores, then cluster. For the second part we used an open source perl API to a C library (very fast) for hierarchical

Clustering is a 2 part process - calculate scores, then cluster. For the second part we used an open source perl API to a C library (very fast) for hierarchical clustering : http://search.cpan.org/~mdehoon/Algorithm-Cluster-1.38/ http://search.cpan.org/~mdehoon/Algorithm-Cluster-1.38/ I picked this niche because Im a scientist, mainly ;) I built the now #1 biology news website on the web (biologynews.net - #1 according to search engines) 3 years ago - Eureka Science News is the logical continuation of this effort.