From: Globe Trotter <itsme_410_at_yahoo.com>

Date: Mon 02 May 2005 - 13:10:55 EST

eigen(X)$vectors

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Mon May 02 13:19:26 2005

Date: Mon 02 May 2005 - 13:10:55 EST

Hi,

It is my understanding that the eigenvectors of a circulant matrix are given as follows:

1,omega,omega^2,....,omega^{p-1}

x<-scan("kinv.dat") #length(x) = 216 y<-x[c(109:216,1:108)] X<-toeplitz(y)

eigen(X)$vectors

Note that the eigenvectors are correct, and they are indeed real, because X is symmetric.

Is this a bug in R? Any insight if not, please!

Many thanks and best wishes!

This is unrelated, but can the R-help archive maintainers please not put e-mail addresses in the archive? This would really help people like me who would like to post using their professional e-mail addresses. Just stripping the e-mail address from everything else would be great, or make it non-spammable by adding some random number or something which would be obvious to anyone reading it without the help of a machine. After all, why give spider programs more fodder?

Best wishes!

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Mon May 02 13:19:26 2005

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