[Octave-bug-tracker] [bug #33887] LU Factorization cannot give a desired order of lower matrix

[Yun]

URL:
  <http://savannah.gnu.org/bugs/?33887>

                 Summary: LU Factorization cannot give a desired order of
lower matrix
                 Project: GNU Octave
            Submitted by: verilog
            Submitted on: Sat 30 Jul 2011 04:54:18 AM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: verilog
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.4
        Operating System: Microsoft Windows

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Details:

I'm not sure if it is a bug

a = [ 1 2 1; 
          2 1 2; 
          1 2 3 ]
[ l, u ] = lu(a)

output:
l=
  0.50000 1.00000 0.00000
  1.00000 0.00000 0.00000
  0.50000 1.00000 1.00000

what I expect:
l=
  1.00000 0.00000 0.00000
  0.50000 1.00000 0.00000
  0.50000 1.00000 1.00000

Thanks!



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File Attachments:


-------------------------------------------------------
Date: Sat 30 Jul 2011 04:54:18 AM GMT  Name: test.m  Size: 43B   By: verilog

<http://savannah.gnu.org/bugs/download.php?file_id=23713>

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