Unweighted pair group mean with arithmetic average UPGMA

1
Unweighted pair group mean with arithmetic
average (UPGMA
I II are closest neighbors
2
5
5
I
II
Treat I,II as composite sequence and rewrite
distance matrix. Now pick closest neighbors,
i.e., III and IV.
3
5
5
10
10
I
II
III
IV
Now, find average distance between these two
clusters (I-III I-IV II-III II-IV) (35
50)/2 42.5
4
11.25
16.25
10
10
5
5
I
II
III
IV
Total height to root from leaf 42.5/2
21.25 Left branch of root 21.25 5 Right
branch 21.25-10