[R] function "eigen" AND Minitab

[Patrick Burns]

Or perhaps it is the idea of "different" that is broken.

If you are doing the same problem, then the eigenvalues
should be equal in the two systems -- up to numerical
error.

If that is true, then the eigenvectors for each distinct
eigenvalue need to span the same space.  Thus the
eigenvectors can always have opposite signs, and for
eigenvalues that are multiple the eigenvectors need look
nothing alike.


Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and "A Guide for the Unwilling S User")

Bill.Venables at csiro.au wrote:
> Simple. Minitab must be broken.  Have you reported it to them?
>
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> On Behalf Of SH.Chou
> Sent: Friday, 18 July 2008 5:24 PM
> To: r-help at r-project.org
> Subject: [R] function "eigen" AND Minitab
>
> Hi all. I got a question about eigenvector. I've tried input a symmetric
> matrix to both R (using eigen function) and minitab, but the result is
> really different. Can anyone tell me what's wrong with that?
>
> Thanks.
>
> 	[[alternative HTML version deleted]]
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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