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

Table 6

The value of clustering validity index on Iris.

2	0.114234	0.223604	17.384973	0.473604
3	0.223973	0.124598	34.572146	0.551565
4	0.316742	0.099103	49.279488	0.615436
5	0.560109	0.089108	87.540968	0.676350
6	0.574475	0.072201	90.563379	0.691340
7	0.400071	0.067005	63.328679	0.735311
8	0.275682	0.036283	45.736972	0.614055
9	0.250971	0.027735	42.868449	0.584244