bugGNU Octave - Bugs: bug #52416, about delaunay document

 
 

bug #52416: about delaunay document

Submitter:  None
Submitted:  Thu 16 Nov 2017 03:39:15 AM UTC
   
 
Category:  Documentation Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Documentation
Status:  Fixed Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  * Closed Release:  * 4.2.1
Operating System:  * Any Fixed Release:  None
Planned Release:  None
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Fri 17 Nov 2017 02:16:42 AM UTC, comment #2: 

Fixed here (http://hg.savannah.gnu.org/hgweb/octave/rev/4746bd294c54).  This will be a part of the 4.2.2 bug fix release.  Thanks for noticing this.  Closing report.

Rik <rik5>
Group administrator
Thu 16 Nov 2017 07:17:44 AM UTC, comment #1: 

The docstring of deprecated 'delaunay3' has the same problem as 'delaunay'.
But the docstring of 'delaunayn' does not have this problem.

Anonymous
Thu 16 Nov 2017 03:39:15 AM UTC, original submission:  

"help delaunay" says that

     For 2-D sets, the return value TRI is a set of triangles which
     satisfies the Delaunay circum-circle criterion, i.e., only a single
     data point from [X, Y] is within the circum-circle of the defining
     triangle.



     For 3-D sets, the return value TETR is a set of tetrahedrons which
     satisfies the Delaunay circum-circle criterion, i.e., only a single
     data point from [X, Y, Z] is within the circum-circle of the
     defining tetrahedron.


but from the result of "demo delaunay",
it seems that "only a single data point" should be changed to "no data point".
<https://en.wikipedia.org/wiki/Delaunay_triangulation> also says that

In mathematics and computational geometry, a Delaunay triangulation for a given set P of discrete points in a plane is a triangulation DT(P) such that no point in P is inside the circumcircle of any triangle in DT(P).


I'm not very sure about this. Please check it carefully. Thanks maintainers.

Anonymous

 

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    Date Changed by Updated Field Previous Value => Replaced by
    2017-11-17 rik5 StatusNone Fixed
        Open/ClosedOpen Closed

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