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MathGroup Archive 2006

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List manipulation

  • To: mathgroup at
  • Subject: [mg70162] List manipulation
  • From: "xun" <xiaoxun at>
  • Date: Fri, 6 Oct 2006 01:58:12 -0400 (EDT)
  • Organization: The Chinese University of Hong Kong


I have something as following:

a = Array[aa, {3, 3}];
b = Array[bb, {3, 3}];
c = Array[cc, {3, 3}];
d = Array[dd, {3, 3}];
A = {{a, b}, {c, d}} (* A consists of four blocks *)
A // MatrixForm

And I want a 6*6 matrix (a list of 6 lists) just as A looks like.
For example, the first row should be



How to get it easily?

Many thanks.

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