Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!spool.mu.edu!uunet!brunix!agm
From: agm@cs.brown.edu (Axel Merk)
Newsgroups: comp.sys.next
Subject: Mathematica: large matrices
Message-ID: <69228@brunix.UUCP>
Date: 20 Mar 91 14:22:18 GMT
Sender: news@brunix.UUCP
Reply-To: agm@cs.brown.edu (Axel Merk)
Distribution: usa
Organization: Brown University Department of Computer Science
Lines: 24

I need to do some 'simple' transformations on a 260x260 matrix of
floating point values, but Mathematica does not seem to like it too
much.
When pasting the matrix into Mathematica from a text file, I inserted
return signs in order not to exceed the maximum size allowed for a
line. Doing this allowed me to paste it.
Assigning the matrix do a variable, i.e. evaluating it, results in
error messages on the console indicating "hash invariants" and a
blow-up of the swapspace.

Are there known limits to the size of a matrix and can they be
increased? I'm aware that I'm dealing with lots of memory and am
willing to allocate the appropriate swapspace, but I have the feeling
that simply assigning a matrix to a variable should not cause the
problem. 

Thanks for any suggestions,

Axel
----------------------------------------------------------------------------
-- Axel Merk	                "One needs a certain amount of blindness  --
-- agm@cs.brown.edu              to see perfection" - Christopher Nuzum   --
-- phone/fax (401)272 2262 Brown University  Box 53  Providence  RI 02912 --
----------------------------------------------------------------------------