SNESMonitorLGRange

Line-graph monitor that plots the residual norm together with residual-range statistics for a SNESSolve()

Synopsis

#include "petscsnes.h"  
#include "petscsnes.h"  
PetscErrorCode SNESMonitorLGRange(SNES snes, PetscInt n, PetscReal rnorm, PetscCtx monctx)

Collective

Input Parameters

• snes - the SNES context

• n - the iteration number

• rnorm - the 2-norm of the residual

• monctx - a PetscViewer of type PETSCVIEWERDRAW set up with PetscViewerMonitorLGSetUp()

Note

Plots four line graphs in the viewer: the residual norm (log scale), the fraction of residual entries larger than 20% of the maximum entry, the relative decrease (prev - rnorm)/prev, and their product.

See Also

SNES: Nonlinear Solvers, SNES, SNESMonitorSet(), SNESMonitorDefault(), PetscViewerDrawGetDrawLG(), PetscDrawLG

Level

intermediate

Location

src/snes/interface/snes.c

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