:orphan:
# SNESMonitorRatioSetUp
Insures the `SNES` object is saving its history since this monitor needs access to it 
## Synopsis
```
#include "petsc/private/snesimpl.h"   
PetscErrorCode SNESMonitorRatioSetUp(SNES snes, PetscViewerAndFormat *vf)
```
Collective


## Input Parameters

- ***snes -*** the `SNES` context
- ***viewer -*** the `PetscViewer` object (ignored)





## See Also
 [](ch_snes), `SNESMonitorSet()`, `SNESMonitorSolution()`, `SNESMonitorDefault()`, `SNESMonitorRatio()`, `PetscViewerFormat`, `PetscViewerAndFormat`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/interface/snesut.c.html#SNESMonitorRatioSetUp">src/snes/interface/snesut.c</A>


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


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