1. Caret package. https://topepo.github.io/caret/
2. Clustersim package. http://keii.ue.wroc.pl/clusterSim/
3. Glass identification database. https://archive.ics.uci.edu/ml/datasets/glass+identification
4. Seeds dataset. https://archive.ics.uci.edu/ml/datasets/seeds
5. Uci - machine learning repository. https://archive.ics.uci.edu/ml/datasets.php