Wind Pressure Coefficients Zoning Method Based on an Unsupervised Learning Algorithm

Table 2

Optimal number of clusters.

Index name	0° pressure		0° suction		−45° pressure		−45° suction
		Index value		Index value		Index value		Index value
CH	11	1121.14	14	1444.45	13	964.93	10	848.55
C	5	0.16	5	0.10	14	0.11	14	0.05
Gamma	2	0.97	14	0.97	14	0.96	8	0.98
DB	2	0.44	13	0.54	11	0.53	7	0.49
Hartigan	3	711.86	5	204.74	3	606.35	5	221.68
Tau	2	4847.49	3	4966.29	3	4240.27	3	5006.18
Scott	3	137.61	3	116.75	3	163.31	3	176.86
Marriot	13	3.37	4	42.97	8	5.84	5	106.16
Friedman	13	238.94	14	155.65	11	65.02	8	46.60
Rubin	13	−221.62	11	−31.08	11	−45.40	8	−27.08
KL	12	84.52	7	680.41	6	8.27	5	25.69
Silhouette	2	0.75	2	0.69	2	0.60	3	0.68
Dunn	10	0.06	7	0.02	13	0.02	5	0.04
SD	4	29.22	3	7.95	4	25.80	6	9.33