Matrix whose elements are the colums numbers

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Noa Prasquier
Noa Prasquier 2021-3-12
评论： David Hill 2021-3-12
Hi,
I need to create a 100*100 matrix with 3 conditions :
  • elements on the diagonal are 0
  • elements below the diagonal contain the column number
  • elements above the diagonal contain the column number with minus sign
it may look simple but I am really new here so I hope someone could help me out :)
thanks in advance

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回答（1 个）

David Hill
David Hill 2021-3-12
n=100;
[a,b]=ind2sub([n,n],1:n^2);
b(b==a)=0;
b(b>a)=-b(b>a);
c=reshape(b,[n,n]);

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