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[Octave-bug-tracker] [bug #41399] The LU decomposition does not return a
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #41399] The LU decomposition does not return a lower triangular L |
Date: |
Thu, 30 Jan 2014 02:37:59 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.102 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?41399>
Summary: The LU decomposition does not return a lower
triangular L
Project: GNU Octave
Submitted by: None
Submitted on: Thu 30 Jan 2014 02:37:57 AM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Donald
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 3.6.4
Operating System: Microsoft Windows
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Details:
N=10; A=eye(N)+diag(1:(N-1),1) + diag(1:(N-1),-1);
[L,U]=lu(A);
min(diag(L,0)) --> returns zero???
diag(L,3) --> returns -0.5???
sum(~~L(2,:))--> return 9???, row at index=2 is almost full???
max(max(abs(A-L*U))) --> returns 4.9960e-016 as it should be.
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Reply to this item at:
<http://savannah.gnu.org/bugs/?41399>
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- [Octave-bug-tracker] [bug #41399] The LU decomposition does not return a lower triangular L,
anonymous <=