[bug #67740] ordschur - new forms of 3rd argument

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Follow-up Comment #12, bug #67740 (group octave):


As far as I can tell this version still does not accept 
<<<
[US,TS] = ordschur(U,T,clusters) reorders multiple clusters simultaneously.
ordschur sorts the specified clusters in descending order along the diagonal
of TS, with the cluster of highest index appearing in the upper left corner.

>>> 
that is needed to be a trexc replacement for fumn.
Somebody should check with Matlab:

T = diag([1, 2, 3, 4, 5, 6]);
U = eye(6);
ord = [1, 2, 3, 1, 2, 3];
[US, TS] = ordschur(U, T, ord);
diag(TS)

If I understand this right it should be
[1; 4; 2; 5; 6]
and with current code I see [1;2;3;4;5;6] so no re-ordering is done.

Dmitri.
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