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[doc] Fix learning to rank tutorial. [skip ci] #10539

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Jul 3, 2024
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[doc] Fix learning to rank tutorial. [skip ci] #10539

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5 changes: 4 additions & 1 deletion doc/tutorials/learning_to_rank.rst
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Expand Up @@ -72,8 +72,11 @@ Please note that, as of writing, there's no learning-to-rank interface in scikit
.. code-block:: python

import pandas as pd

# `X`, `qid`, and `y` are from the previous snippet, they are all sorted by the `sorted_idx`.
df = pd.DataFrame(X, columns=[str(i) for i in range(X.shape[1])])
df["qid"] = qid[sorted_idx]
df["qid"] = qid

ranker.fit(df, y) # No need to pass qid as a separate argument

from sklearn.model_selection import StratifiedGroupKFold, cross_val_score
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