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Text File | 1994-02-21 | 634 b | 24 lines | [TEXT/RLAB] |
- schord:
-
- Syntax: schord ( SCH_LIST, IFST, ILST )
-
- Description:
-
- Schord re-orders the real-Schur/Schur factorization of a
- real/complex matrix:
-
- A = z * t * z'
-
- so that the diagonal block of t with row index IFST is moved
- to row ILST. The real-Schur/Schur form t is re-ordered by an
- orthogonal/unitary similarity transformation O'*t*O. The
- matrix z of Schur vectors is updated by postmultiplying it
- with O.
-
- The 1st argument to schord, SCH_LIST is the output list from
- schur(). SCH_LIST must contain elements `z' and `t'.
-
- Schord uses the LAPACK subroutines DTREXC, and ZTREXC.
-
- See Also: schur
-