SVDMonitorConditioning#

Print the condition number at each iteration of the singular value solver.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDMonitorConditioning(SVD svd,PetscInt its,PetscInt nconv,PetscReal *sigma,PetscReal *errest,PetscInt nest,PetscViewerAndFormat *vf)

Collective

Input Parameters#

  • svd - singular value solver context

  • its - iteration number

  • nconv - (unused) number of converged singular triplets so far

  • sigma - (unused) singular values

  • errest - (unused) error estimates

  • nest - (unused) number of error estimates to display

  • vf - viewer and format for monitoring

Options Database Key#

  • -svd_monitor_conditioning - activates SVDMonitorConditioning()

Note#

Works only for solvers that use a DS of type GSVD. The printed information corresponds to the maximum of the condition number of the two generated bidiagonal matrices.

See Also#

SVDMonitorSet(), SVDMonitorAll(), SVDMonitorFirst(), SVDMonitorConverged()

Level#

intermediate

Location#

src/svd/interface/svdmon.c

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