How do I do train-validation-test split here?

[xiaodaigh]

If I don't want to use cross-validation or if I want to know the exactly split so I can replicate things

[ppalmes]

you can take a look at the Readme in Lale.jl because they share common Base Class. it shows example of splitting data. also, you can use holdout function which is exported and available. let me know if you still need help. https://github.com/IBM/Lale.jl