Add function to extract training + validation set after initial_validation_split()

[paulcbauer]

Hi, I am just coming back from teaching a tidymodels workshop (tidymodels is fun to teach!). I wonder whether it might make sense to add a function, e.g., training_validation() that can be used to extract the full training set at the end. That is assuming one wants to build the final model on the latter. Right now, one would do this manually I think, e.g., below:

data_train <- training(data_split)
data_validation <- validation(data_split)
data_test <- testing(data_split)
data_train_full <- bind_rows(data_train, data_validation)

[hfrick]

Thanks for the request and nice to hear that it's fun to teach tidymodels! Have you seen last_fit() from tune for that final model fit? It has an argument add_validation_set which allows you to specify that both the training and validation set are used to train that final model.
https://tune.tidymodels.org/reference/last_fit.html

[paulcbauer]

Haven't seen it and it solves the problem. Thanks!

[hfrick]

Excellent, closing this issue then!

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