limitation on size of read-in matrix, was: Re: GCL limitation

Greetings!

I'm not sure at all about the details here, but in general I would
suggest one represent matrices as arrays rather than lists -- one can
manipulate large matrices thus much more efficiently.  You can even
have it both ways with a 'turbo list' -- set each array element to
point to the cons the car of which is the element you want -- you can
then access the data both ways.  I had something like this worked up
for the GCL compiler, but in the end I didn't need the list part.

Take care,

Robert Dodier <robert_dodier@yahoo.com> writes:

> Hello all,
> 
> If it's not clear to readers, Andrej is not trying to write
> a clumsy function with more than 64 arguments.  Instead he 
> is running into trouble with numericalio (as he stated).
> 
> Numericalio.lisp constructs a matrix like this:
> 
>  (defun $read_matrix (file-name &optional sep-ch-flag)
>   `(($matrix) ,@(cdr ($read_nested_list file-name sep-ch-flag))))
> 
> I wrote that, but since my grasp of Lisp is fairly primitive,
> I must have adapted it from elsewhere. (Perhaps something
> Barton Willis wrote?) 
> 
> As Maximists know, the matrix function takes a list of rows
> as its arguments, e.g. M: matrix ([1,2], [3,4]);
> So, it appears, one must supply 65 or more arguments to make
> a matrix with that 65 or more rows. This is the essence of
> the problem, I believe.
> 
> I don't yet have an answer for Andrej, but at this point
> I hope the nature of the problem is clearer.
> 
> Regards to all, 
> Robert Dodier
> 
> 
> 		
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-- 
Camm Maguire			     			camm@enhanced.com
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah