Research Article
An Improved Fuzzy c-Means Clustering Algorithm Based on Shadowed Sets and PSO
Table 1
Performance of FCM, RCM, SCM, SRCM, and SP-FCM on four UCI data sets.
| Different indices | Algorithm | Data sets | Iris | Wine | Glass | Ionosphere |
| DB index | FCM | 0.7642 | 0.8803 | 2.2971 | 2.0587 | RCM | 0.6875 | 0.5692 | 1.9635 | 1.5434 | SCM | 0.6862 | 0.5327 | 1.8495 | 1.4763 | SRCM | 0.6613 | 0.4436 | 1.5804 | 1.3971 | SP-FCM | 0.6574 | 0.4328 | 1.5237 | 1.4066 |
| Dunn index | FCM | 2.3106 | 2.5834 | 0.1142 | 0.8381 | RCM | 2.7119 | 2.8157 | 0.2637 | 1.0233 | SCM | 2.4801 | 2.7992 | 0.3150 | 1.0319 | SRCM | 3.0874 | 3.1342 | 0.5108 | 1.1924 | SP-FCM | 3.3254 | 3.1764 | 0.4921 | 1.2605 |
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