| doughnut | Doughnut shaped dataset |
| doughnutRand | Doughnut shaped dataset with 8 extra random attributes |
| doughnutRandRotated | Doughnut shaped dataset with 8 extra random attributes and rotated |
| nntrf | nntrf: a supervised transformation function based on neural networks (Neural Net based Transformations) |
| nntrf_doughnut | nntrf_doughnut: a benchmark of three doughnut datasets |
| nntrf_iris | nntrf_iris: a benchmark for the iris dataset |