Re: [eigen] Partial eigenvalue decomposition

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To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [eigen] Partial eigenvalue decomposition
From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
Date: Mon, 14 Sep 2015 22:30:34 +0200
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Hi,

no, the algorithm implemented in Eigen is designed efficiently extract all eigenvalues-vectors at once. Nonetheless, this project based on Eigen might be interesting for you: https://github..com/yixuan/arpack-eigen

Gael.

On Wed, Sep 9, 2015 at 3:01 PM, Romain Brégier <r.bregier@xxxxxxxxxxx> wrote:

Hi,

Is there a way with Eigen to retrieve only the k first eigenvalues and eigenvectors of a nxn self adjoint positive matrix (considering the eigenvalues in decreasing order, and k < n)?
I did not find such a tool in the documentation but maybe I missed something.

Thanks,
Romain

Follow-Ups:
- Re: [eigen] Partial eigenvalue decomposition
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References:
- [eigen] Partial eigenvalue decomposition
  - From: Romain Brégier

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