[R] Grouping on a Distance Matrix
Dario Strbenac
dstr7320 at uni.sydney.edu.au
Thu Feb 13 09:00:12 CET 2014
Hello,
I'm looking for a function that groups elements below a certain distance threshold, based on a distance matrix. In other words, I'd like to group samples without using a standard clustering algorithm on the distance matrix. For example, let the distance matrix be :
A B C D
A 0 0.03 0.77 1.12
B 0.03 0 1.59 1.11
C 0.77 1.59 0 0.09
D 1.12 1.11 0.09 0
Two clusters would be found with a cutoff of 0.1. The first contains A,B. The second has C,D. Is there an efficient function that does this ? I can think of how to do this recursively, but am hoping it's already been considered.
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Dario Strbenac
PhD Student
University of Sydney
Camperdown NSW 2050
Australia
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