KSPGetResidualNorm#
Gets the last (possibly approximate and/or preconditioned) residual norm that has been computed.
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPGetResidualNorm(KSP ksp, PetscReal *rnorm)
Not Collective
Input Parameter#
ksp - the iterative context
Output Parameter#
rnorm - residual norm
Note#
For some methods, such as KSPGMRES, the norm is not computed directly from the residual.
The type of norm used by the method can be controlled with KSPSetNormType()
See Also#
KSP: Linear System Solvers, KSP, KSPSetNormType(), KSPBuildResidual(), KSPNormType
Level#
intermediate
Location#
Examples#
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages