Maxima Newbie Question: Matrix*Vector multiplication ?
Subject: Maxima Newbie Question: Matrix*Vector multiplication ?
From: Valery Pipin
Date: Wed, 10 Mar 2004 20:55:59 +0800
Welcome!
On Wednesday 10 March 2004 18:38, you wrote:
| Dear group,
|
| I want to multiply a matrix A with a vector b, but I cannot figure out how
| to do that simple operation. (I feel a bit stupid, but I have googled, and
| read the Maxima Book and the help
| files...)
|
| Example:
| 8<-------------
|
| load(VECT);
| load(EIGEN);
|
| A:matrix([a11,a12],[a21,a22]);
| b:COLUMNVECTOR([b1,b2]);
|
| A . b;
| ----------
| I get:
| "Circular rule attempted - TELLSIMPAFTER"
What version of maxima and lisp do you have? What sytem do you run?
On debian linux and maxima cvs everything works in expecting way
(C9) b:COLUMNVECTOR([b1,b2]);
[ B1 ]
(D9) [ ]
[ B2 ]
(C10) A . b;
[ a12 B2 + a11 B1 ]
(D10) [ ]
[ a22 B2 + a21 B1 ]
I don't know how to help you.