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Re: [cgal-discuss] PCA bug not solved completely


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  • From: Pierre Alliez <>
  • To:
  • Subject: Re: [cgal-discuss] PCA bug not solved completely
  • Date: Thu, 10 Sep 2009 16:47:17 +0200
  • Organization: INRIA

thank you very much - I am fixing it right now.

Pierre Alliez
INRIA Sophia Antipolis - Mediterranee
Project-team GEOMETRICA
http://www-sop.inria.fr/members/Pierre.Alliez/
Tel: +33 4 92 38 76 77
Fax: +33 4 97 15 53 95



杨成林 a écrit :
> Hello
> I reported a bug in PCA component in Feb. In CGAL 3.5 beta1 I have
> seen the change, but I don't think the problem is fixed.
> It is about line 709-710 in PCA_util.h of CGAL 3.4. The condition is
> too strong for regular case. Now in CGAL 3.5 beta1, it is line
> 708-709. I think the condition is still too strong, but for degenerate
> case. To confirm degenerate case, only "eigen_values[1] ==
> eigen_values[2]" is needed. "eigen_values[0] != eigen_values[2]" is
> not a guarantee of regular case.
>
> --
> 杨成林



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