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Created on 2016-05-02 20:59 by Peter.Norvig, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Messages (2) | |||
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| msg264670 - (view) | Author: Peter Norvig (Peter.Norvig) | Date: 2016-05-02 20:59 | |
mean([True, True, True, False]) should be 0.75, but it returns 0.25.
The fix is to change _sum so that when the type is bool, the result should be coerced to int, not bool.
Why it is important for statistics.mean to work with bools:
It is natural to say something like
mean(x > threshold for x in data)
and expect to get the percentage of items in data that are above threshold.
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| msg264675 - (view) | Author: R. David Murray (r.david.murray) *  |
Date: 2016-05-02 21:41 | |
Already fixed: #24068. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:30 | admin | set | github: 71100 |
| 2016-05-02 21:41:14 | r.david.murray | set | status: open -> closed superseder: statistics module - incorrect results with boolean input nosy: + r.david.murray messages: + msg264675 resolution: duplicate stage: resolved |
| 2016-05-02 21:24:42 | zach.ware | set | versions: - Python 3.4 |
| 2016-05-02 21:05:49 | berker.peksag | set | nosy:
+ steven.daprano |
| 2016-05-02 20:59:11 | Peter.Norvig | create | |