[Rd] error code 1 from Lapack routine 'dsyevr'
Prof Brian Ripley
ripley at stats.ox.ac.uk
Sun Feb 1 08:53:45 CET 2015
On 31/01/2015 14:15, eigen wrote:
> 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?
The help page for eigen says
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
*> INFO is INTEGER
*> = 0: successful exit
*> < 0: if INFO = -i, the i-th argument had an illegal value
*> > 0: Internal error
so it means 'internal error'.
> Theoretically the eigenvalues should be nonnegative, if it helps.
> Thank you!
Brian D. Ripley, ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK
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