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strange problem
From: |
Gerald Ebberink |
Subject: |
strange problem |
Date: |
Thu, 27 Nov 2003 23:11:31 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031125 |
Hi all,
I have a strange problem with a simple matrix multiplication
and maybe you could help out (and maybe it was asked a dozen times
before, but I could not find it in the archives)
when i give the following command:
octave:1> [1,100;0,1]*[1,0;(-1/100),1]
I get this result
ans =
-2.0817e-17 1.0000e+02
-1.0000e-02 1.0000e+00
which as far as I know is correct except for the upper left value.
If you do it by hand you would get something like
1 + (100*-1/100) = 0
octave agrees on with me on that part
octave:2> 1 + (100*-1/100)
ans = 0
so how does this strange number gets up there?
and even better is there a solution because this gives me a unworkable
solution in the end.
I've used
GNU Octave, version 2.1.49 (i686-pc-linux-gnu).
on a 2.4.2x kernel (several computers)
Kind regards
Gerald Ebberink
--
Ing. Gerald Ebberink
Laser Technician
Kernfysisch Versneller Instituut
Rijksuniversiteit Groningen
Zernikelaan 25
9747 AA Groningen
The Netherlands
tel: +31 50 363 3518
lab: +31 50 363 3588
fax: +31 50 363 4003
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