Table 7.

Davis-Bouldin index, Silhouette index and Dunn index for K-means and FCM for different number of clusters

No. of clusters (k)	Davis–Bouldin Index		Silhouette Index		Dunn Index
	K-means	FCM	K-means	FCM	K-means	FCM
2	0.27176	0.27997	0.84657	0.84839	0.39929	0.40432
3	0.17135	0.16057	0.93450	0.93920	0.62890	0.65713
4	0.36474	0.33448	0.87381	0.87908	0.21406	0.21948
5	0.46005	0.40427	0.84385	0.85726	0.16064	0.17965
6	0.47942	0.39610	0.78656	0.83318	0.14337	0.15385
7	0.46085	0.38838	0.77244	0.81777	0.13161	0.16337
8	0.45613	0.39438	0.77421	0.82022	0.12803	0.26181
9	0.45913	0.40567	0.77543	0.82778	0.12015	0.15875
10	0.46786	0.42155	0.78759	0.83192	0.11318	0.17251