octave-bug-tracker
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Octave-bug-tracker] [bug #33887] LU Factorization cannot give a desired


From: Yun
Subject: [Octave-bug-tracker] [bug #33887] LU Factorization cannot give a desired order of lower matrix
Date: Sat, 30 Jul 2011 04:54:19 +0000
User-agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)

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

    _______________________________________________________

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!



    _______________________________________________________

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>

    _______________________________________________________

Reply to this item at:

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

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/




reply via email to

[Prev in Thread] Current Thread [Next in Thread]