bugGNU Octave - Bugs: bug #49463, bad output from voronoi


bug #49463: bad output from voronoi

Submitted by:  None
Submitted on:  Fri 28 Oct 2016 12:15:28 AM UTC  
Category:  Libraries Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  Duplicate Assigned to:  None
Originator Name:  Emil Millet Originator Email:  -email is unavailable-
Open/Closed:  Closed Release:  4.0.3
Operating System:  Microsoft Windows

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Fri 28 Oct 2016 05:23:33 AM UTC, comment #3: 

Thanks, I'm closing this bug as a duplicate. Please follow up with any more information on bug #38295.

I don't have any knowledge about this function or the qhull library myself, just helping to triage. It sounds like we can mark bug #38295 as confirmed, but it's possible more specific information is needed there to help figure out what needs to be done.

Mike Miller <mtmiller>
Project Administrator
Fri 28 Oct 2016 01:00:00 AM UTC, comment #2: 

38295 looks to me the same.
I asked a friend to do the 123-231 case in Matlab
and it gave a plot with just three segments.
I did not look at the array outputs.
(Nor have I validated any of the possibly-correct segments.)
I am at your service for any other subtasks.

Fri 28 Oct 2016 12:28:42 AM UTC, comment #1: 

Can you take a look at previously reported bug #38295? The descriptions of these bugs sound the same to me. Maybe you can provide the missing info requested on the other bug report?

Mike Miller <mtmiller>
Project Administrator
Fri 28 Oct 2016 12:15:28 AM UTC, original submission:  

voronoi(x, y)

Plotted output looks OK until you zoom out and see extra segments.
Extra segments are present also in the [vx,vy]=voronoi(...) form.
Same results under Linux.

Under Windows,

voronoi(x, y)
xlim( [-2, 3] )
ylim( [-2, 3] )

gives various pathologies, sometimes too many, sometimes too few.



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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-10-28 mtmiller StatusNone => Duplicate
        Open/ClosedOpen => Closed
        Dependencies- => Depends on bugs #38295

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