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
