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Fix error bucket docs to correctly reflect indexes #1520

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Nov 23, 2019
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Fix error bucket docs to correctly reflect indexes #1520

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2c13983
Fix error bucket docs to correctly reflect indexes
vincentschen Nov 23, 2019
e892170
Address PR
vincentschen Nov 23, 2019
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9 changes: 6 additions & 3 deletions snorkel/analysis/error_analysis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -30,13 +30,16 @@ def get_label_buckets(*y: np.ndarray) -> Dict[Tuple[int, ...], np.ndarray]:
>>> buckets = get_label_buckets(Y_gold, Y_pred)

The returned ``buckets[(i, j)]`` is a NumPy array of data point indices with
predicted label i and true label j.
true label i and predicted label j.

More generally, the returned indices within each bucket refer to the order of the
labels that were passed in as function arguments.

>>> buckets[(1, 1)] # true positives
array([0, 1])
>>> (1, 0) in buckets # false negatives
>>> (1, 0) in buckets # false positives
False
>>> (0, 1) in buckets # false positives
>>> (0, 1) in buckets # false negatives
False
>>> (0, 0) in buckets # true negatives
False
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