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feat: add stratify param support to ml.model_selection.train_test_split method #815

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Merged
merged 6 commits into from
Jul 10, 2024
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feat: add stratify param support to ml.model_selection.train_test_split method #815

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feat: add stratify param to ml.model_selection.train_test_split
GarrettWu Jul 2, 2024
82d34d3
fix mypy
GarrettWu Jul 2, 2024
fd0e813
Merge branch 'main' into garrettwu-split
GarrettWu Jul 2, 2024
2e64e0d
add notes for limit
GarrettWu Jul 10, 2024
c972ca0
Merge remote-tracking branch 'github/main' into garrettwu-split
GarrettWu Jul 10, 2024
273daf0
Merge remote-tracking branch 'github/garrettwu-split' into garrettwu-…
GarrettWu Jul 10, 2024
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add notes for limit
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@GarrettWu
GarrettWu committed Jul 10, 2024
commit 2e64e0d2b3ca0ae4561145fbe30fde62233c7319
1 change: 1 addition & 0 deletions bigframes/ml/model_selection.py
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Expand Up @@ -50,6 +50,7 @@ def train_test_split(
stratify: (bigframes.series.Series or None, default None):
If not None, data is split in a stratified fashion, using this as the class labels. Each split has the same distribution of the class labels with the original dataset.
Default to None.
Note: By setting the stratify parameter, the memory consumption and generated SQL will be linear to the unique values in the Series. May return errors if the unique values size is too large.

Returns:
List[Union[bigframes.dataframe.DataFrame, bigframes.series.Series]]: A list of BigQuery DataFrames or Series.
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