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LU Factorizations
From: |
Nick Allen |
Subject: |
LU Factorizations |
Date: |
11 Mar 2003 20:36:34 -0500 |
I have a question about using Octave to determine an LU matrix
factorization. Straight out of the manual for the "lu" function I run:
[l, u, p] = lu (a)
l =
1.00000 0.00000
0.33333 1.00000
u =
3.00000 4.00000
0.00000 0.66667
p =
0 1
1 0
but if i then do l*u I get:
3 4
1 2
when it should result in the original matrix a, which was:
1 2
3 4
Could someone please explain to me what is going on? Is this a problem
with Octave, or is it a fault in my basic understanding of LU
factorizations? By the way I am running Octave 2.1.36 on an ia32 Linux
platform.
Thanks
Nick
--
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Nick Allen <address@hidden>
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LU Factorizations,
Nick Allen <=