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docs: update ML overview API doc
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‎README.rst

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@@ -94,10 +94,18 @@ using the
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and the `bigframes.ml.compose module <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.compose>`_.
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BigQuery DataFrames offers the following transformations:
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* Use the `OneHotEncoder class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.OneHotEncoder>`_
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in the ``bigframes.ml.preprocessing`` module to transform categorical values into numeric format.
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* Use the `KBinsDiscretizer class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.compose.ColumnTransformer>`_
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in the ``bigframes.ml.preprocessing`` module to bin continuous data into intervals.
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* Use the `LabelEncoder class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.LabelEncoder>`_
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in the ``bigframes.ml.preprocessing`` module to normalize the target labels as integer values.
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* Use the `MaxAbsScaler class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.MaxAbsScaler>`_
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in the ``bigframes.ml.preprocessing`` module to scale each feature to the range ``[-1, 1]`` by its maximum absolute value.
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* Use the `MinMaxScaler class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.MinMaxScaler>`_
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in the ``bigframes.ml.preprocessing`` module to standardize features by scaling each feature to the range ``[0, 1]``.
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* Use the `StandardScaler class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.StandardScaler>`_
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in the ``bigframes.ml.preprocessing`` module to standardize features by removing the mean and scaling to unit variance.
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* Use the `OneHotEncoder class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.preprocessing.OneHotEncoder>`_
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in the ``bigframes.ml.preprocessing`` module to transform categorical values into numeric format.
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* Use the `ColumnTransformer class <https://cloud.google.com/python/docs/reference/bigframes/latest/bigframes.ml.compose.ColumnTransformer>`_
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in the ``bigframes.ml.compose`` module to apply transformers to DataFrames columns.
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