Similarity Measurement and Classification of English Characters Based on Language Features

Table 3

Calculation and test results based on the cluster test method.

Method	AP clustering			Spectral clustering		Kmeans clustering
	NUM	Entropy	Purity	Entropy	Purity	Entropy	Purity
Mean clustering	14	0.96	0.74	0.74	0.47	1.84	0.41
Hierarchical clustering	9	2.13	0.28	0.28	0.41	2.22	0.24
SOM clustering	18	0.33	0.90	0.90	0.82	1.26	0.66
FCM clustering	18	0.60	0.85	1.60	0.50	1.68	0.51