Wind Pressure Coefficients Zoning Method Based on an Unsupervised Learning Algorithm

Table 4

The most unfavorable suction—the clustering validity indices in full wind direction.

k	CH	C	Gamma	DB	Hartigan	Tau	Scott	Marriot	Friedman	Rubin	KL	Silhouette	Dunn	SD index
2	−25	0.195	0.876	0.705	109	1195	358	287	18.7	19.7	4.3	0.688	0.112	13.5
3	30	0.129	0.789	0.698	614	1372	409	422	29.2	30.2	0.2	0.523	0.011	10.3
4	327	0.221	0.870	0.528	61	1393	554	224	100.3	101.3	113.0	0.586	0.021	4.6
5	387	0.149	0.950	0.427	46	1320	654	152	232.5	233.5	0.8	0.654	0.021	4.8
6	439	0.126	0.924	0.496	24	1047	684	170	299.0	300.0	0.2	0.597	0.021	8.1
7	443	0.110	0.921	0.523	45	891	706	193	358.0	359.0	1.6	0.566	0.013	11.6
8	533	0.089	0.941	0.515	7	792	738	193	467.8	468.8	0.4	0.590	0.013	14.4
9	493	0.085	0.944	0.478	10	763	748	226	506.9	507.9	1.2	0.598	0.013	14.7
10	476	0.071	0.951	0.464	26	648	765	241	586.6	587.6	5.0	0.628	0.011	18.7