SVDTRLanczosGetScale#

Gets the scale parameter for the GSVD.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDTRLanczosGetScale(SVD svd,PetscReal *scale)

Not Collective

Input Parameter#

  • svd - the singular value solver context

Output Parameter#

  • scale - the scale parameter

Notes#

This parameter is relevant for the GSVD case only. If the parameter is positive, it indicates the scale factor for B in matrix Z=[A;B]. If negative, its absolute value is the threshold for automatic scaling.

See Also#

SVD: Singular Value Decomposition, SVDTRLanczosSetScale()

Level#

advanced

Location#

src/svd/impls/trlanczos/trlanczos.c

Implementations#

SVDTRLanczosGetScale_TRLanczos() in src/svd/impls/trlanczos/trlanczos.c

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