slepc-3.21.0 2024-03-30

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.

Level

intermediate

Location

src/svd/interface/svdmon.c

Index of all SVD routines
Table of Contents for all manual pages
Index of all manual pages