.With the aid of R, perform hierarchical clustering for the following
OTUs measured on characters x and y. For dist use method="euclidean"
and for hclust use method="complete". Note with which OTUs C clusters.
x y
A 1.0 9.0
B 2.0 8.0
C 4.0 6.0
D 5.5 4.5
E 6.5 3.5
F 8.0 2.0
Now repeat the process for all OTUs except D, and observe the cluster
membership of C. Performa scatter plot for OTUs A,. . . ,F using the plot and
points functions, and explain why C changed its group membership when D
was omitted.
Note: OTUs arranged like this can create other problems when singlelinkage
clustering is used: see Section 10.4.2 and Everitt and Dunn (2001) for
a discussion of chaining.
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