Data set repositories

www.kaggle.com/datasets

https://archive-beta.ics.uci.edu/ml/datasets

https://datasetsearch.research.google.com/

https://datahub.io/collections

https://data.gov/

https://ieee-dataport.org/

https://elsevier.digitalcommonsdata.com/collections/e9797bf7-f3e6-4500-9d6f-aac6f9491859

Supplemental info in open access journal e.g.Peerj allows public accesses to paper data sets and codes