ids was denoted by model. Suppose a hanging tree of the 20

ids is cut into three clusters. Table 2.5 shows the cutting result,

e amino acids A, Q, G, H, S and T were clustered into one group

others were clustered into other two groups. Figure 2.20 shows

e clusters after cutting the tree shown in Figure 2.17. The heights

lusters were 0.48, 0.87 and 0.86.

. The cluster indexes of a hclust model of 20 amino acids cut by cutree.

N

D

C

Q

E

G

H

I

L

K

M

F

P

S

T

W

Y

V

2

2

2

1

2

1

1

3

3

2

2

3

2

1

1

3

2

2

(a) (b) (c)

20. The clusters generated by cutree(model,k=3) for 20 amino acids.

hanging tree of 20 amino acids was cut based on the maximum

subtrees of two, Table 2.6 shows the cutting the result. With this

mino acids were grouped into two clusters. Figure 2.21 shows

o clusters, where it can be seen that the maximal height of these

ers was 1.73, which was less than two.

(a) (b)

21. The clusters generated by cutree(model,h=2) for 20 amino acids.