\brief \b ESMF_DGEBAK \htmlonly Download ESMF_DGEBAK + dependencies [TGZ] [ZIP] [TXT] \endhtmlonly \par Purpose:
\verbatim
ESMF_DGEBAK forms the right or left eigenvectors of a real general matrix by backward transformation on the computed eigenvectors of the balanced matrix output by ESMF_DGEBAL. \endverbatim \param[in] JOB \verbatim JOB is CHARACTER*1 Specifies the type of backward transformation required: = ‘N’, do nothing, return immediately; = ‘P’, do backward transformation for permutation only; = ‘S’, do backward transformation for scaling only; = ‘B’, do backward transformations for both permutation and scaling. JOB must be the same as the argument JOB supplied to ESMF_DGEBAL. \endverbatim
\param[in] SIDE \verbatim SIDE is CHARACTER*1 = ‘R’: V contains right eigenvectors; = ‘L’: V contains left eigenvectors. \endverbatim
\param[in] N \verbatim N is INTEGER The number of rows of the matrix V. N >= 0. \endverbatim
\param[in] ILO \verbatim ILO is INTEGER \endverbatim
\param[in] IHI \verbatim IHI is INTEGER The integers ILO and IHI determined by ESMF_DGEBAL. 1 <= ILO <= IHI <= N, if N > 0; ILO=1 and IHI=0, if N=0. \endverbatim
\param[in] SCALE \verbatim SCALE is DOUBLE PRECISION array, dimension (N) Details of the permutation and scaling factors, as returned by ESMF_DGEBAL. \endverbatim
\param[in] M \verbatim M is INTEGER The number of columns of the matrix V. M >= 0. \endverbatim
\param[in,out] V \verbatim V is DOUBLE PRECISION array, dimension (LDV,M) On entry, the matrix of right or left eigenvectors to be transformed, as returned by DHSEIN or DTREVC. On exit, V is overwritten by the transformed eigenvectors. \endverbatim
\param[in] LDV \verbatim LDV is INTEGER The leading dimension of the array V. LDV >= max(1,N). \endverbatim
\param[out] INFO \verbatim INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value. \endverbatim \author Univ. of Tennessee \author Univ. of California Berkeley \author Univ. of Colorado Denver \author NAG Ltd. \date December 2016 \ingroup doubleGEcomputational
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1) | :: | JOB | ||||
| character(len=1) | :: | SIDE | ||||
| integer | :: | N | ||||
| integer | :: | ILO | ||||
| integer | :: | IHI | ||||
| double precision | :: | SCALE(*) | ||||
| integer | :: | M | ||||
| double precision | :: | V(LDV,*) | ||||
| integer | :: | LDV | ||||
| integer | :: | INFO |