Using Mathematica, I've performed a hierarchical clustering of 3,107 U. S. counties based on 1995-2000 intercounty migration, using an algorithm of my own devising (see http://arxiv.org/abs/0807.1550). I can also generate the associated 3,107 x 3,107 matrix of ultrametric distances.
Unfortunately, as far as I have been able to determine, the Mathematica hierarchical clustering package only produces readable dendrograms with twenty-or-so or fewer units. So, I'm wondering whether I can be more successful in looking at my clustering results overall with R (which I have not previously used). Please note that I'd rather not have to produce a hierarchical clustering from scratch using one of the more standard methodologies (single, complete linkage,...). So, I might have to use the (non-sparse) 3,107 x 3,107 matrix of ultrametric distances as an input distance matrix. Thanks for any suggestions/information..., Paul B. Slater ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
