A Self-Adaptive Fuzzy c-Means Algorithm for Determining the Optimal Number of Clusters

Table 13

The value of clustering validity index on SD4.

2	0.104434	0.208832	99.1482710	0.473748
3	0.170326	0.142561	162.044450	0.458832
4	0.221884	0.081007	211.692699	0.583529
5	0.156253	0.053094	157.683921	0.603211
6	0.123191	0.041799	118.279116	0.575396
7	0.165465	0.032411	107.210082	0.592625
8	0.145164	0.028698	139.310969	0.606049