MFNMonitorSet#

Sets an ADDITIONAL function to be called at every iteration to monitor convergence.

Synopsis#

#include "slepcmfn.h" 
PetscErrorCode MFNMonitorSet(MFN mfn,MFNMonitorFn *monitor,void *mctx,PetscCtxDestroyFn *monitordestroy)

Logically Collective

mfn - matrix function context obtained from MFNCreate()
monitor - pointer to function (if this is NULL, it turns off monitoring), see MFNMonitorFn
mctx - [optional] context for private data for the monitor routine (use NULL if no context is desired)
monitordestroy - [optional] routine that frees monitor context (may be NULL), see PetscCtxDestroyFn for the calling sequence

-mfn_monitor - print the error estimate
-mfn_monitor draw::draw_lg - sets line graph monitor for the error estimate
-mfn_monitor_cancel - cancels all monitors that have been hardwired into a code by calls to MFNMonitorSet(), but does not cancel those set via the options database.

The options database option -mfn_monitor and related options are the easiest way to turn on MFN iteration monitoring.

MFNMonitorRegister() provides a way to associate an options database key with MFN monitor function.

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

intermediate