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Issues with eigs

From: Manav Bhatia
Subject: Issues with eigs
Date: Thu, 6 Sep 2018 23:08:04 -0500


   I have a set of matrices, M0 and M1 (attached), obtained from numerical discretization of a beam problem. 

   I am attempting to solve the eigenproblem    M1 x = lambda M0 x . 

   Computing this with the following works fine:
>  m0 = load(‘M0.txt’); m1 = load(‘M1.txt’);
>  eig( m1, m0)

    However, using eigs( m1, m0) throws the following error: 
error: __eigs__: eigs: error -8 in dnaupd
error: called from
    eigs at line 285 column 18

    I am not sure what could be causing this. Any guidance will be appreciated. 


Attachment: M0.txt
Description: Text document

Attachment: M1.txt
Description: Text document

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