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MathGroup Archive 1999

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Re: Dealing with submatrices

  • To: mathgroup at
  • Subject: [mg18121] Re: Dealing with submatrices
  • From: Harald Giese <giese at>
  • Date: Fri, 18 Jun 1999 00:51:32 -0400
  • Organization: Institut fuer Meereskunde, Universitaet Hamburg
  • References: <7ka5m3$>
  • Sender: owner-wri-mathgroup at

Chris Hall wrote:
> I want to construct a 9x9 matrix using 9 existing 3x3 matrices:
> M = { {m11, m12, m13}, {m21, m22, m23}, {m31, m32, m33}}
> The problem is that this creates a too-deep nested list and I can't
> figure out how
> to make it a 9x9.  Flatten doesn't appear to be the right tool.


the package LinearAlgebra`MatrixManipulation` (Mathematica 3.0) will serve you.


Harald Giese
Email: giese at
Phone: +49 (0)40 42838 5796; Fax: +49 (0)40 5605724
Institut fuer Meereskunde der Universitaet Hamburg
(Institute of Oceanography of the University of Hamburg)
Troplowitzstrasse 7, D-22529 Hamburg

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