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Re: Matrix problem...
From: |
Paul Thomas |
Subject: |
Re: Matrix problem... |
Date: |
Mon, 03 May 2004 20:49:33 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225 |
antonio luiz oliveira de noronha wrote:
Hi
Please, I was trying to use octave to make some calculations with
matrices... and i could not... does anyone know how to do this
A*B multiplication ?
| sin(theta) cos(theta) | | sin(theta) sin(theta) |
A=| | and B=| |
| sin(theta) cos(theta) | | sin(theta) sin(theta) |
Without giving the explicit vallues to theta??
Thanks
Write a function;
function vout = myfunc( theta );
st = sin( theta );
ct = cos( theta );
A = [ st , ct ; st , ct ];
B = [ st , st ; st , st ];
vout = A* B;
endfunction
Alternatively, since all the elements of A * B are the same, use
vout = ones( 2 , 2 ) * ( sin( theta ) ^ 2 + sin( 2 * theta ) / 2 ) ;
Paul T
______________________________________________________________________
| |
|Antonio Luiz Oliveira de Noronha - address@hidden |
|Theoretical Inorganic Physical Chemistry - LQIT |
|Chemistry Departament - DQ |
|UFMG - Federal University of Minas Gerais - Brazil |
|Av. Antonio Carlos, 6627 - Campus Pampulha |
|CEP 31270-901 - Belo Horizonte - MG - Brazil |
|VOICE +55 31 499 5776 - FAX +55 31 499 5700 |
|______________________________________________________________________|
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Octave is freely available under the terms of the GNU GPL.
Octave's home on the web: http://www.octave.org
How to fund new projects: http://www.octave.org/funding.html
Subscription information: http://www.octave.org/archive.html
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- Matrix problem..., antonio luiz oliveira de noronha, 2004/05/03
- Re: Matrix problem...,
Paul Thomas <=