[Scipy-tickets] [SciPy] #554: arpack eigen does not return eigenvectors

SciPy scipy-tickets@scipy....
Sat Dec 8 17:09:15 CST 2007


#554: arpack eigen does not return eigenvectors
----------------------+-----------------------------------------------------
 Reporter:  insyzygy  |       Owner:  somebody
     Type:  defect    |      Status:  new     
 Priority:  normal    |   Milestone:  0.7     
Component:  Other     |     Version:          
 Severity:  normal    |    Keywords:          
----------------------+-----------------------------------------------------
 I'm not sure if its appropriate to report bugs in the sandbox packages,
 but I also have a fix for the bug so I thought I would.

 The arpack.eigen command returns an array of zeros instead of
 eigenvectors.

 If at line 208
 in

 {{{
   dr,di,z,info=\
             eigextract(rvec,howmny,sselect,sigmar,sigmai,workev,
                    bmat,which,k,tol,resid,v,iparam,ipntr,
                    workd,workl,info)

 }}}

 z is changed to zr, it works perfectly.

-- 
Ticket URL: <http://scipy.org/scipy/scipy/ticket/554>
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