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Re: strange problem
From: |
Geraint Paul Bevan |
Subject: |
Re: strange problem |
Date: |
Fri, 28 Nov 2003 09:17:22 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 |
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Laurent Jacques wrote:
| Of course but I think that the question was:
|
| Why the top-left entry of
| [1,100;0,1]*[1,0;(-1/100),1]
| is
| -2.0817e-17
| while octave returns the true 0 if you enter
| 1 + (100*-1/100)
|
| Does Octave perform some LU decomposing of matrix to realize matrix
| multiplication ?
| This could explain the difference between the two results.
|
Octave uses the BLAS (or ATLAS) library to manipulate matrices:
http://www.netlib.org/blas/index.html
- --
Geraint Bevan
http://homepage.ntlworld.com/geraint.bevan
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Message not available
strange problem, John W. Eaton, 2003/11/28