[Octave-bug-tracker] [bug #34185] LUINC: pivot matrix output is a vector

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?34185>

                 Summary: LUINC: pivot matrix output is a vector
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 31 Aug 2011 11:26:42 PM UTC
                Category: Libraries
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: UMCP
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.4.2
        Operating System: GNU/Linux

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Details:

The pivot matrix outputted by LUINC is a vector even without specifying the
optional 'vector' input argument. It should be a matrix (LU is okay). This
affects Octave 3.2.4 and 3.4.2. Example:

octave->   [ail aiu aip] = luinc(sparse([1 2 ; 7 9]), 1e-3)
...
aip =

   2
   1

versus:

octave->  [ail aiu aip] = lu([1 2 ; 7 9])
...
aip =

Permutation Matrix

   0   1
   1   0






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