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Hi, I got an error message in my program saying "Error in eigen(gene_intersection.kernel) : error code 1 from Lapack routine 'dsyevr' Execution halted". As you see, I was trying to compute the eigenvalues of a matrix but got this error. Is there anyone who knows what this error means and how I can fix it? Theoretically the eigenvalues should be nonnegative, if it helps.

...halted". > > As you see, I was trying to compute the eigenvalues of a matrix but got this > error. Is there anyone who knows what this error means and how I can fix it? The help page for eigen says Source: By default ?eigen? uses the LAPACK routines ?DSYEVR?, ?DGEEV?, ?ZHEEV? and ?ZGEEV? LAPACK is from <URL: http://www.netlib.org/lapack> and its guide is listed in the references. You need to consult that guide and/or the source code: all I saw at a cursory look was *> \param[out] INFO *> \verbatim *> INFO is INTEGER *>...

I noticed that there is some redundant text in eigen.Rd (both the patched and the devel version). "whereas" appears to be a leftover of previous versions. \source{ By default \code{eigen} uses the LAPACK routines \code{DSYEVR}, \code{DGEEV}, \code{ZHEEV} and \code{ZGEEV} whereas LAPACK is from \url{http://www.netlib.org/lapack} and its guide is listed in the references. } Berend

Dear all I am so glad the R can provide the efficient calculate about eigenvector and eigenvalue. However, i have some puzzle about the procedure of eigen. Fristly, what kind of procedue does the R utilize such that the eigen are obtained? For example, A=matrix(c(1,2,4,3),2,2) we can define the eigenvalue lamda, such as det | 1-lamda 4 | =0 | 2 3-lamda | then