is grouped k-fold basically required once your rows aren't independent?
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went with a since it's the textbook reason, but i only really believe it now after a leakage bug bit me. i was doing a random k-fold and didn't realize rows from the same underlying record were split across folds, so validation looked great and it fell apart in prod. once i grouped the splits by re…
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- 2026-09-17 16:46 · r/learnmachinelearning
is grouped k-fold basically required once your rows aren't independent?