How can I extract the diagonal of a given matrix with using size? I know we can do it directly with diag.
MATLAB: How to extract the diagonal of a given matrix
doit4meextractdiagusingsize
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"eig" is definitely the correct function, and I think you can rest assured that the output is correct. Can you post a simple example that you think is wrong?
Construct an n x n cell array initialized to zeros(k,k) . This can be done in a single statement.
Construct (or read in) A.
= eye(k)Loop n from 0 to n-2
Write copies of 
along diagonal # 
of the cell array. If you work at this a bit, this can be done with a single statement.
along diagonal # of the cell array. If you work at this a bit, this can be done with a single statement.Multiply 
by A giving revised 
, which promotes it to 
by A giving revised , which promotes it to end loop
cell2mat() the cell array.
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