How to construct a "ones" matrix with zero blocks in the diagonal

Question

Lama Hamadeh 2021-7-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/884744-how-to-construct-a-ones-matrix-with-zero-blocks-in-the-diagonal

回答： Matt J 2021-7-24

采纳的回答： DGM

Hi all,

I am trying to construct the follwoing matrix and any help would be highly appreciated.

Thank you.

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Answer 1

DGM 2021-7-23

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https://ww2.mathworks.cn/matlabcentral/answers/884744-how-to-construct-a-ones-matrix-with-zero-blocks-in-the-diagonal#answer_752739

编辑：DGM 2021-7-23

在 MATLAB Online 中打开

This display is going to get cut off, but this should serve as an example.

A = ones(4);
B = 1 - blkdiag(A,A,A,A)
B = 16×16
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     1     1     1     1     0     0     0     0     1     1     1     1
   1     1     1     1     1     1     1     0     0     0     0     1     1     1     1

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Answer 2

Matt J 2021-7-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/884744-how-to-construct-a-ones-matrix-with-zero-blocks-in-the-diagonal#answer_752774

在 MATLAB Online 中打开

repelem(1-eye(4),4,4)
ans = 16×16
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   0     0     0     1     1     1     1     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     0     0     0     0     1     1     1     1     1     1     1     1
   1     1     1     1     1     1     1     0     0     0     0     1     1     1     1
   1     1     1     1     1     1     1     0     0     0     0     1     1     1     1