BatchOverallVarianceAnalyzerPostProcessing

Analyzer to compute subgroup variance metrics using the defined post-processor.

Parameters

• postprocessor

  One of postprocessors from aif360 (https://aif360.readthedocs.io/en/stable/modules/algorithms.html#module-aif360.algorithms.postprocessing)

• sensitive_attribute (str)

  A sensitive attribute to use for post-processing

• base_model

  Base model for stability measuring

• base_model_name (str)

  Model name like 'DecisionTreeClassifier' or 'LogisticRegression'

• bootstrap_fraction (float)

  [0-1], fraction from train_pd_dataset for fitting an ensemble of base models

• X_train (pandas.core.frame.DataFrame)

  Processed features train set

• y_train (pandas.core.frame.DataFrame)

  Targets train set

• X_test (pandas.core.frame.DataFrame)

  Processed features test set

• y_test (pandas.core.frame.DataFrame)

  Targets test set

• target_column (str)

  Name of the target column

• dataset_name (str)

  Name of dataset, used for correct results naming

• n_estimators (int)

  Number of estimators in ensemble to measure base_model stability

• random_state (int) – defaults to None

  [Optional] Controls the randomness of the bootstrap approach for model arbitrariness evaluation

• with_predict_proba (bool) – defaults to True

  [Optional] A flag if model can return probabilities for its predictions. If no, only metrics based on labels (not labels and probabilities) will be computed.

• notebook_logs_stdout (bool) – defaults to False

  [Optional] True, if this interface was execute in a Jupyter notebook, False, otherwise.

• verbose (int) – defaults to 0

  [Optional] Level of logs printing. The greater level provides more logs. As for now, 0, 1, 2 levels are supported.

Methods

UQ_by_boostrap

Quantifying uncertainty of the base model by constructing an ensemble from bootstrapped samples and applying postprocessing intervention.

Return a dictionary where keys are models indexes, and values are lists of correspondent model predictions for X_test set.

Parameters

• boostrap_size (int)
• with_replacement (bool)
• with_fit (bool) – defaults to True

compute_metrics

Measure metrics for the base model. Save results to a .csv file.

Parameters

• save_results (bool) – defaults to True
• with_fit (bool) – defaults to True

save_metrics_to_file