petsc-3.3-p7 2013-05-11

SNESMonitorSet

Sets an ADDITIONAL function that is to be used at every iteration of the nonlinear solver to display the iteration's progress.

Synopsis

#include "petscsnes.h"  
#include "petscdmshell.h" 
#include "petscsys.h" 
PetscErrorCode  SNESMonitorSet(SNES snes,PetscErrorCode (*monitor)(SNES,PetscInt,PetscReal,void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))

Logically Collective on SNES

Input Parameters

	snes	- the SNES context
	func	- monitoring routine
	mctx	- [optional] user-defined context for private data for the monitor routine (use PETSC_NULL if no context is desired)
	monitordestroy	- [optional] routine that frees monitor context (may be PETSC_NULL)

Calling sequence of func

    int func(SNES snes,PetscInt its, PetscReal norm,void *mctx)

	snes	- the SNES context
	its	- iteration number
	norm	- 2-norm function value (may be estimated)
	mctx	- [optional] monitoring context

Options Database Keys

	-snes_monitor	- sets SNESMonitorDefault()
	-snes_monitor_draw	- sets line graph monitor, uses SNESMonitorLGCreate()
	-snes_monitor_cancel	- cancels all monitors that have been hardwired into a code by calls to SNESMonitorSet(), but does not cancel those set via the options database.

Notes

Several different monitoring routines may be set by calling SNESMonitorSet() multiple times; all will be called in the order in which they were set.

Fortran notes: Only a single monitor function can be set for each SNES object

Keywords

SNES, nonlinear, set, monitor

Examples

src/snes/examples/tutorials/ex2.c.html
src/snes/examples/tutorials/ex3.c.html
src/snes/examples/tutorials/ex21.c.html
src/snes/examples/tutorials/ex22.c.html
src/snes/examples/tutorials/ex43.c.html
src/ts/examples/tutorials/ex7.c.html
src/ts/examples/tutorials/ex12.c.html