Table 4:
Overview of the Data Sets.
| Data Set | Points | Classes | Balanced | +EV | -EV |
| Aural Sonar |  | 2 | yes |  |  |
| Chromosoms |  |  | yes |  |  |
| Delft |  |  | yes |  |  |
| FaceRec |  |  | no |  |  |
| ProDom |  |  | no |  |  |
| Protein |  | 4 | no |  |  |
| Sonatas |  | 5 | no |  | 4 |
| SwissProt |  |  | no |  |  |
| Voting |  | 2 | no |  |  |
| Zongker |  |  | yes. |  |  |
| Data Set | Points | Classes | Balanced | +EV | -EV |
| Aural Sonar | | 2 | yes | | |
| Chromosoms | | | yes | | |
| Delft | | | yes | | |
| FaceRec | | | no | | |
| ProDom | | | no | | |
| Protein | | 4 | no | | |
| Sonatas | | 5 | no | | 4 |
| SwissProt | | | no | | |
| Voting | | 2 | no | | |
| Zongker | | | yes. | | |
Note: The last two columns refer to the number of positive and negative eigenvalues, respectively.