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Re: Solving Systems Of Linear Equations

From: Przemek Klosowski
Subject: Re: Solving Systems Of Linear Equations
Date: Tue, 6 May 2003 10:48:30 -0400 (EDT)

Octave has a built-in help system, with full Octave manual available
online; it is one of the best things about octave, actually, in my opinion.
In particular, if you did:

   octave>  help -i

you'd get the table of contents of the manual; then, you could have 
searched for 'linear equations:

         s                       <- search command
         linear equation<CR>     <- search term, ended by Enter key
         s <CR>                  <- first search finds 'NONlinear equations'

whence you find the chapter on 'Solving Linear Equations', which says:

   To solve the set of linear equations `aX = b', use the left division
   operator, `\':

     octave:7> a \ b

   This is conceptually equivalent to `inv (a) * b', but avoids computing
   the inverse of a matrix directly.

The manual has actually a lot of information on linear algebra and numerical
computations in its own right, and is worth perusing casually from time to time.

Octave is freely available under the terms of the GNU GPL.

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