ty matrix. At least it would make sense, although I'm not sure
> whether it really is what hclust does, because I didn't check the
> underlying Fortran code.
>
> Note that I may have missed postings in this thread, so sorry if this
> doesn't add to wha
Apparently, the same issue exists in SAS, where there is an option to run the
Ward algorithm based only on the distance matrix. Perhaps, a SAS user could
confirm that or even check with SAS.
Peter
--
View this message in context:
http://r.789695.n4.nabble.com/hclust-with-method-ward-tp2952140
The clustering function hclust has a method = "ward”, and apparently many
people use that option. However, the Ward method seems to minimize an
increase in the error sums of squares, which are calculated with respect to
the cluster mean. However, hclust has only a dissimilarity matrix as an
input.
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