Table 3. Comparison of the numbers of clusters for internal evaluation indices.
| Standard number of clusters | DB. | XB | V C | V PE | V H&H | CVI | |
|---|---|---|---|---|---|---|---|
| Iris | 3 | 2 | 2 | 3 | 3 | 3 | 3 |
| Wine | 3 | 3 | 9 | 4 | 3 | 3 | 3 |
| Thyroid | 2 | 5 | 8 | 2 | 2 | 2 | 2 |
| Yeast | 10 | 10 | 10 | 8 | 7 | 10 | 10 |
| Glass | 6 | 2 | 8 | 2 | 2 | 15 | 6 |
| Dermatology | 6 | 4 | 4 | 2 | 2 | 14 | 5 |