inpolygon, different results from MATLAB R2022a and R2023a?

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Junichiro Kawahara
Junichiro Kawahara 2023-12-12
评论： DGM 2023-12-13
Ran in:
aoi1_x = [0, 960];
aoi1_y = [0, 1080];
inpolygon(2, 2, aoi1_x, aoi1_y)
ans = logical
0
R2022a returns 1, but R2023a returns 0.
I would like to know why these results differ.
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Dyuman Joshi
Dyuman Joshi 2023-12-12
I disagree. It's frustrating to know that a well known* bug is not even acknowleged by TMW, nor is there any acknowlegment of the bug being fixed for the later versions.
And the fact that it is still not fixed for the versions mentioned, just adds onto the frustration.
* - I say well known because it appears across multiple versions.
Adam Danz
Adam Danz 2023-12-12
编辑：Adam Danz 2023-12-12
To confirm what others have mentioned above, this behavior was updated in R2022b.
A bug report was not published.
For FAQs on bug reports, see https://www.mathworks.com/support/bug_reports/faq.html

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回答（1 个）

Cris LaPierre
Cris LaPierre 2023-12-12
This is not an official MathWorks answer.
My observation is the following. You used to be able to define a rectangular ROI by specifying just 2 diagonal vertices. However, this behavior was undocumented. All doc examples and wording indicate you should specify all vertices. Apparently around R2022b, changes were made to the function that no longer allow you to specify a rectangular ROI with just 2 points.
This example highlights the risk of using undocumented behavior - it can change at any time without notice.
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DGM
DGM 2023-12-13
Ah. I didn't even expect that to be a thing. That kind of makes the other bug report make more sense now.

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