[Octave-bug-tracker] [bug #35796] svd() errors on 2 x N matrices

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?35796>

                 Summary: svd() errors on 2 x N matrices
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 11 Mar 2012 11:37:09 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: forkandwait
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.1
        Operating System: *BSD

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Details:

I am seeing problems on SVD, possible related to LAPACK and friends.  I get an
error depending on the shape of the matrix given to svd, and 2xN's bomb out,
while Nx2's seem to do fine.

This error is also occurring in the qp() function, but I assume because it is
calling SVD

It may very well be due to my LAPACK installation, but I don't know how to
determine that. 


109> myS
myS =

  1.00  1.00
  1.00  1.00
  1.00  1.00
  0.99  1.00
  0.99  0.99
  0.99  0.99
  0.99  0.99
  0.99  0.99
  0.98  0.99
  0.97  0.98
  0.95  0.97
  0.92  0.96
  0.89  0.94
  0.84  0.91
  0.76  0.86
  0.66  0.78
  0.53  0.67
  0.38  0.51
  0.25  0.33
  0.15  0.19
  0.08  0.09
  0.04  0.04

110> svd(myS')
 ** On entry to DORGLQ parameter number  5 had an illegal value
error: svd: exception encountered in Fortran subroutine dgesvd_
110> svd(myS,1);
111> 





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