bigframes.ml.impute.SimpleImputer

class bigframes.ml.impute.SimpleImputer(strategy: Literal['mean', 'median', 'most_frequent'] = 'mean')

Univariate imputer for completing missing values with simple strategies.

Replace missing values using a descriptive statistic (e.g. mean, median, or most frequent) along each column.

Examples:

>>> import bigframes.pandas as bpd
>>> from bigframes.ml.impute import SimpleImputer
>>> X_train = bpd.DataFrame({"feat0": [7.0, 4.0, 10.0], "feat1": [2.0, None, 5.0], "feat2": [3.0, 6.0, 9.0]})
>>> imp_mean = SimpleImputer().fit(X_train)
>>> X_test = bpd.DataFrame({"feat0": [None, 4.0, 10.0], "feat1": [2.0, None, None], "feat2": [3.0, 6.0, 9.0]})
>>> imp_mean.transform(X_test)
   imputer_feat0  imputer_feat1  imputer_feat2
0            7.0            2.0            3.0
1            4.0            3.5            6.0
2           10.0            3.5            9.0

[3 rows x 3 columns]

Parameters:

strategy ({'mean', 'median', 'most_frequent'}, default='mean') – The imputation strategy. ‘mean’: replace missing values using the mean along the axis. ‘median’:replace missing values using the median along the axis. ‘most_frequent’, replace missing using the most frequent value along the axis.

Methods

__init__([strategy])
fit(X[, y])	Fit the imputer on X.
fit_transform(X[, y])	Fit to data, then transform it.
get_params([deep])	Get parameters for this estimator.
to_gbq(model_name[, replace])	Save the transformer as a BigQuery model.
transform(X)	Impute all missing values in X.