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

Table 11

The value of clustering validity index on SD2.

2	0.066286	0.132572	132.81503	0.382572
3	0.068242	0.063751	137.52535	0.394200
4	0.060916	0.028149	123.09967	0.378337