Fast question!
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Walter Roberson
2011-11-28
If the output matrix is to be n by n, then
M = diag(ones(m-1,1),1) + diag(-ones(m-1,1),-1) + diag(1,1-n) + diag(1,n-1);
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Walter Roberson
2011-11-28
There are faster ways using ordinary assignments.
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