LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
|
subroutine sget40 | ( | real | RMAX, |
integer | LMAX, | ||
integer, dimension( 2 ) | NINFO, | ||
integer | KNT, | ||
integer | NIN | ||
) |
SGET40
SGET40 tests STGEXC, a routine for swapping adjacent blocks (either 1 by 1 or 2 by 2) on the diagonal of a pencil in real generalized Schur form. Thus, STGEXC computes an orthogonal matrices Q and Z such that Q' * ( [ A B ], [ D E ] ) * Z = ( [ C1 B1 ], [ F1 E1 ] ) ( [ 0 C ] [ F ] ) ( [ 0 A1 ] [ D1] ) where (C1,F1) is similar to (C,F) and (A1,D1) is similar to (A,D). Both (A,D) and (C,F) are assumed to be in standard form and (A1,D1) and (C1,F1) are returned with the same properties.
[out] | RMAX | RMAX is REAL Value of the largest test ratio. |
[out] | LMAX | LMAX is INTEGER Example number where largest test ratio achieved. |
[out] | NINFO | NINFO is INTEGER array, dimension (2) NINFO( 1 ) = STGEXC without accumulation returned INFO nonzero NINFO( 2 ) = STGEXC with accumulation returned INFO nonzero |
[out] | KNT | KNT is INTEGER Total number of examples tested. |
[in] | NIN | NIN is INTEGER Input logical unit number. |