:orphan:
# TSMonitorSet
Sets an ADDITIONAL function that is to be used at every timestep to display the iteration's  progress. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSMonitorSet(TS ts, PetscErrorCode (*monitor)(TS, PetscInt, PetscReal, Vec, void *), void *mctx, PetscErrorCode (*mdestroy)(void **))
```
Logically Collective


## Input Parameters

- ***ts -*** the `TS` context obtained from `TSCreate()`
- ***monitor -*** monitoring routine
- ***mctx -*** [optional] user-defined 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`
```none
PetscErrorCode monitor(TS ts, PetscInt steps, PetscReal time, Vec u, void *mctx)
```

- ***ts -*** the `TS` context
- ***steps -*** iteration number (after the final time step the monitor routine may be called with a step of -1, this indicates the solution has been interpolated to this time)
- ***time -*** current time
- ***u -*** current iterate
- ***mctx -*** [optional] monitoring context





## Note
This routine adds an additional monitor to the list of monitors that already has been loaded.


## Fortran Note
Only a single monitor function can be set for each `TS` object


## See Also
 [](ch_ts), `TSMonitorDefault()`, `TSMonitorCancel()`, `TSDMSwarmMonitorMoments()`, `TSMonitorExtreme()`, `TSMonitorDrawSolution()`,
`TSMonitorDrawSolutionPhase()`, `TSMonitorDrawSolutionFunction()`, `TSMonitorDrawError()`, `TSMonitorSolution()`, `TSMonitorSolutionVTK()`,
`TSMonitorLGSolution()`, `TSMonitorLGError()`, `TSMonitorSPSwarmSolution()`, `TSMonitorError()`, `TSMonitorEnvelope()`, `TSDMSwarmMonitorMoments()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/tsmon.c.html#TSMonitorSet">src/ts/interface/tsmon.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11.c.html">src/ts/tutorials/ex11.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11_sa.c.html">src/ts/tutorials/ex11_sa.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex12.c.html">src/ts/tutorials/ex12.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex14.c.html">src/ts/tutorials/ex14.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex16.c.html">src/ts/tutorials/ex16.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex16fwd.c.html">src/ts/tutorials/ex16fwd.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex18.c.html">src/ts/tutorials/ex18.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex19.c.html">src/ts/tutorials/ex19.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex2.c.html">src/ts/tutorials/ex2.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex20.c.html">src/ts/tutorials/ex20.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex20adj.c.html">src/ts/tutorials/ex20adj.c</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/interface/tsmon.c)


[Index of all TS routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)