alipy.query_strategy.multi_label.
QueryNoisyOraclesRandom
Select a random oracle to query.
Methods
select
select(self, label_index, unlabel_index, model=None, **kwargs)
Query from oracles. Return the index of selected instance and oracle.
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Parameters:
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label_index: {list, np.ndarray, IndexCollection}
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The indexes of labeled samples.
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unlabel_index: {list, np.ndarray, IndexCollection}
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The indexes of unlabeled samples.
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model: object, optional (default=None)
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Current classification model, should have the 'predict_proba' method for probabilistic output.
If not provided, LogisticRegression with default parameters implemented by sklearn will be used.
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n_neighbors: int, optional (default=10)
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How many neighbors of the selected instance will be used
to evaluate the oracles.
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Returns:
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selected_instance: int
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The index of selected instance.
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selected_oracle: int or str
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The index of selected oracle.
If a list is given, the index of oracle will be returned.
If a Oracles object is given, the oracle name will be returned.
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select_by_prediction_mat
select_by_prediction_mat(self, label_index, unlabel_index, predict, **kwargs)
Query from oracles. Return the index of selected instance and oracle.
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Parameters:
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label_index: {list, np.ndarray, IndexCollection}
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The indexes of labeled samples.
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unlabel_index: {list, np.ndarray, IndexCollection}
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The indexes of unlabeled samples.
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predict: : 2d array, shape [n_samples, n_classes]
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The probabilistic prediction matrix for the unlabeled set.
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n_neighbors: int, optional (default=10)
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How many neighbors of the selected instance will be used
to evaluate the oracles.
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Returns:
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selected_instance: int
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The index of selected instance.
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selected_oracle: int or str
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The index of selected oracle.
If a list is given, the index of oracle will be returned.
If a Oracles object is given, the oracle name will be returned.
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select_by_given_instance
select_by_given_instance(self, selected_instance)
Select oracle to query by providing the index of selected instance.
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Parameters:
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selected_instance: int
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The indexes of selected samples. Should be a member of unlabeled set.
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Returns:
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selected_oracles: list
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The selected oracles for querying.
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