[Scipy-tickets] [SciPy] #1735: linalg.eig test failure (test_singular)

SciPy Trac scipy-tickets@scipy....
Sat Sep 22 04:32:43 CDT 2012


#1735: linalg.eig test failure (test_singular)
--------------------------+-------------------------------------------------
 Reporter:  rgommers      |       Owner:  somebody   
     Type:  defect        |      Status:  new        
 Priority:  normal        |   Milestone:  Unscheduled
Component:  scipy.linalg  |     Version:  devel      
 Keywords:                |  
--------------------------+-------------------------------------------------

Comment(by rgommers):

 Or maybe the sign difference can actually cause values to be different
 after multiplication with the same eigen vectors:
 {{{
         w, vr = eig(A,B)
         wt = eigvals(A,B)
         val1 = dot(A, vr)
         val2 = dot(B, vr) * w
 }}}
 Would be useful if you could check that abs(w) and abs(wt) are almost
 equal Josef.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1735#comment:1>
SciPy <http://www.scipy.org>
SciPy is open-source software for mathematics, science, and engineering.


More information about the Scipy-tickets mailing list