A=[1,2,3;4,5,6;7,8,9] 1 2 3 % define index of upper elements , triu: all above K=1 diagonal4 5 6 7 8 9 idx = logical(triu(ones(size(A)), 1)) 0 1 1 0 0 1 0 0 0 % extract as vector v = A(idx)' 2 3 6 % convert back as matrix, if required B=zeros(size(A)) ; B(idx)=v 0 2 3 0 0 6 0 0 0 |
Matrix >