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DOC More notes about the difference between the three base scorers #14358

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Merged
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Jul 19, 2019
Merged

DOC More notes about the difference between the three base scorers #14358

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DOC More notes about the difference between the three base scorers
qinhanmin2014 Jul 14, 2019
dfcd0aa
maybe?
qinhanmin2014 Jul 15, 2019
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qinhanmin2014 Jul 18, 2019
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10 changes: 10 additions & 0 deletions sklearn/metrics/scorer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -449,6 +449,16 @@ def make_scorer(score_func, greater_is_better=True, needs_proba=False,
>>> from sklearn.svm import LinearSVC
>>> grid = GridSearchCV(LinearSVC(), param_grid={'C': [1, 10]},
... scoring=ftwo_scorer)

Notes
-----
If `needs_proba=False` and `needs_threshold=False`, the score
function is supposed to accept the output of `predict`. If
`needs_proba=True`, the score function is supposed to accept the
output of `predict_proba` (For binary `y_true`, the score function is
supposed to accept probability of the positive class). If
`needs_threshold=True`, the score function is supposed to accept the
output of `decision_function`.
"""
sign = 1 if greater_is_better else -1
if needs_proba and needs_threshold:
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