Clustering and Classification methods for Biologists


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Cluster Analysis - SAQs

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Interval variables

Details

A simple data set is provided and you are asked to calculate three separate distance matrics. You should then use these to construct dendrograms using single linkage clustering. In order to simplify calculations there are only five cases and two variables (which share the same scale).

Case x y
1 1 2
2 3 2
3 6 6
4 10 7
5 8 8

Hint: Try plotting a simple sketch scatter graph first.

You should calculate distance matrices and dendrograms (single linkage) for the following distance measures:

Measure Answers
Euclidean Euclidean answers
Squared Eucliean Squared Euclidean answers
Manhattan (city block) Manhatten Answers

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