slepc-3.16.1 2021-11-17
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Sets an ADDITIONAL function to be called at every iteration to monitor convergence.


#include "slepcmfn.h" 
PetscErrorCode MFNMonitorSet(MFN mfn,PetscErrorCode (*monitor)(MFN,PetscInt,PetscReal,void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))
Logically Collective on mfn

Input Parameters

mfn  - matrix function context obtained from MFNCreate()
monitor  - pointer to function (if this is NULL, it turns off monitoring)
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)

Calling Sequence of monitor

  monitor(MFN mfn,int its,PetscReal errest,void *mctx)

mfn  - matrix function context obtained from MFNCreate()
its  - iteration number
errest  - error estimate
mctx  - optional monitoring context, as set by MFNMonitorSet()

Options Database Keys

-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.


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

See Also


Location: src/mfn/interface/mfnmon.c
Index of all MFN routines
Table of Contents for all manual pages
Index of all manual pages