Top "Train-test-split" questions

Questions with this tag are about how to split the machine learning data set into random train and test subsets.

Stratified Train/Validation/Test-split in scikit-learn

There is already a description here of how to do stratified train/test split in scikit via train_test_split (…

python scikit-learn train-test-split
Should Feature Selection be done before Train-Test Split or after?

Actually, there is a contradiction of 2 facts that are the possible answers to the question: The conventional answer is to …

machine-learning feature-selection train-test-split
How to generate a train-test-split based on a group id?

I have the following data: pd.DataFrame({'Group_ID':[1,1,1,2,2,2,3,4,5,5], 'Item_id':[1,2,3,4,5,6,7,8,9,10], 'Target': [0,0,1,0,1,1,0,0,0,1]}) Group_ID Item_id Target 0 1 1 0 1 1 2 0 2 1 3 1 3 2 4 0 4 2 5 1 5 2 6 1 6 3 7 0 7 4 8 0 8 5 9 0 9 5 10 1 I need to …

python-3.x pandas machine-learning grouping train-test-split