Reorder Eigenvalues in Schur factorization (Descending order)

2020 4 14

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How can I rearrange the eigenvalues in descending order using ordschur?

I've tried the example below, but unable to rearrange the diagonal of matrix T in descending order.

H = magic(10);
[U,T]=schur(H);
[~, select] = sort(ordeig(T));
[US, TS] = ordschur(U, T, select); 

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Jake 2020-4-14

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Upon searching and trials, this worked.

H = magic(10);
[U,T]=schur(H);
[~, i] = sort(ordeig(T));
[~, j] = sort(i);
[US, TS] = ordschur(U, T, j);

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