Sorting eigenvalues and vectors together

A. M. Archibald peridot.faceted at gmail.com
Fri Oct 27 12:19:40 CDT 2006


On 27/10/06, jeremito <jeremit0 at gmail.com> wrote:
> I am using a = numpy.linalg.eig(A) to get the eigenvalues and
> eigenvectors.  I am interested only in the largest eigenvalue so I
> would like to sort the first element of a.  But if I do that, I won't
> know what is the associated eigenvector.  Is there a function that will
> sort the values and vectors together or do I need to write it myself.

I think that they are sorted, but argsort() will do what you want (or
argmax(), even).

A. M. Archibald

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