Re: Out of Memory Problem (beginner)
- To: mathgroup at smc.vnet.net
- Subject: [mg44349] Re: Out of Memory Problem (beginner)
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Wed, 5 Nov 2003 10:02:17 -0500 (EST)
- Organization: The University of Western Australia
- References: <bo7pdn$am2$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <bo7pdn$am2$1 at smc.vnet.net>, cedric at ddd.co.jp (Cedric)
wrote:
> I have a matrix of 6000 x 7000.
> A = Table[i,{i,1,6000},{j,1,7000}]
> I'd like to calculate A.Transpose[A].
> But it appears "Out of Memory" problem after
> trying to calculate for a long time.
>
> Does anybody know how i can olve the above problem?
You can obtain the general element of such a matrix: If A is of size
m x n,
A = Table[i, {i, 1, m}, {j, 1, n}];
then
A . Transpose[A] == n Table[i j, {i, m}, {j, m}]
Cheers,
Paul
--
Paul Abbott Phone: +61 8 9380 2734
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