Re: [Rd] eigen() error: R Version 1.6.1 on Mac OS X (PR#2550)

[Stefano Iacus]

Under Darwin R 1.6.2 and R-1.6.1 I get

> sg
[,1] [,2] [,3] [,4] [,5]
[1,] 3.240 2.592 2.592 2.592 2.592
[2,] 2.592 3.240 2.592 2.592 2.592
[3,] 2.592 2.592 3.240 2.592 2.592
[4,] 2.592 2.592 2.592 3.240 2.592
[5,] 2.592 2.592 2.592 2.592 3.240
> eigen(sg)$values
[1] 13.608 0.648 0.648 0.648 0.648

as well as under Carbon R 1.6.1 and 1.6.2

I cannot reproduce your behaviour.

stefano




On Venerd́, feb 14, 2003, at 21:37 Europe/Rome, [EMAIL PROTECTED] wrote:

Consider this matrix:

sg

     X1    X2    X3    X4    X5
1 3.240 2.592 2.592 2.592 2.592
2 2.592 3.240 2.592 2.592 2.592
3 2.592 2.592 3.240 2.592 2.592
4 2.592 2.592 2.592 3.240 2.592
5 2.592 2.592 2.592 2.592 3.240

If I compute the eigenvalues of the 'sg' matrix using R Version 1.5.0
(2002-04-29) under Linux (or using Version 1.4.0  (2001-12-19) under
Solaris), I obtain:

eigen(sg)

$values
[1] 13.608 0.648 0.648 0.648 0.648

I also obtain the same eigenvalues under R Version 1.5.1 (2002-06-17) under
Mac OS X 10.2.3.

However, if I compute the eigenvalues of the 'sg' matrix using R Version
1.6.1 (2002-11-01) under Mac OS X 10.2.3, I obtain a different answer:

eigen(sg)

$values
[1] 13.123930  0.648000  0.648000  0.648000 -1.732930

det(sg)

[1] 2.399354

det(sg,method="eigenvalues")

[1] -7.312317


Thanks,
 -- Dan --

______________________________________________
[EMAIL PROTECTED] mailing list
http://www.stat.math.ethz.ch/mailman/listinfo/r-devel

______________________________________________
[EMAIL PROTECTED] mailing list
http://www.stat.math.ethz.ch/mailman/listinfo/r-devel