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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.



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