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Re: Question about ArrayFlatten

  • To: mathgroup at
  • Subject: [mg112224] Re: Question about ArrayFlatten
  • From: Bill Rowe <readnews at>
  • Date: Sun, 5 Sep 2010 05:28:33 -0400 (EDT)

On 9/4/10 at 4:01 AM, lightnation at (lightnation) wrote:

>The coding below is not working. I don't know what is wrong. Please
>give me some advice.

>m1 = ConstantArray[0, {2 Length[genindex], 2 Length[genindex]}];
>m2 =  ConstantArray[0, {Length[genindex], 2 Length[genindex]}];
>m3 =  ConstantArray[0, {Length[genindex], Length[genindex]}];
>m4 = IdentityMatrix[Length[genindex]];

>Au1 = ArrayFlatten[{{m1}, {m2}, {m3, m4}}];

I am going to guess the result you are looking for is the output
that results from


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