How can I generate n*(n^2) matrix with n 1's per row, indented n times?

Question

Ingrid Wilson 2022-3-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1672024-how-can-i-generate-n-n-2-matrix-with-n-1-s-per-row-indented-n-times

评论： Ingrid Wilson 2022-3-15

采纳的回答： KSSV

在 MATLAB Online 中打开

Hi,

I'm trying to generate the following matrix (n=3 in this case)

A1partition =

1 1 1 0 0 0 0 0 0

0 0 0 1 1 1 0 0 0

0 0 0 0 0 0 1 1 1

or for example if n=4:

A1partition =

1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1

But I'm struggling to indent the 1's each row. This is my code as now

n=3;
A = zeros(n,n*n);
for i = 1:n
    for j=1:n
        A(i,j)=1;
    end
end
A

which gives

A =

1 1 1 0 0 0 0 0 0

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Answer 1

KSSV 2022-3-15

0
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https://ww2.mathworks.cn/matlabcentral/answers/1672024-how-can-i-generate-n-n-2-matrix-with-n-1-s-per-row-indented-n-times#answer_917994

在 MATLAB Online 中打开

n = 4 ; 
A = zeros(n,n,n) ;
for i = 1:n
    A(i,:,i) = ones(n,1) ;
end
A = reshape(permute(A,[1,2,3]),size(A,2),[])
A = 4×16
     1     1     1     1     0     0     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     1     1     1     1     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     1     1     1     1     0     0     0     0
     0     0     0     0     0     0     0     0     0     0     0     0     1     1     1     1