:orphan:
# SNESView
Prints or visualizes the `SNES` data structure. 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESView(SNES snes, PetscViewer viewer)
```
Collective


## Input Parameters

- ***snes -*** the `SNES` context
- ***viewer -*** the `PetscViewer`



## Options Database Key

- ***-snes_view -*** Calls `SNESView()` at end of `SNESSolve()`





## Notes
The available visualization contexts include

- ***`PETSC_VIEWER_STDOUT_SELF` -*** standard output (default)
- ***`PETSC_VIEWER_STDOUT_WORLD` -*** synchronized standard
output where only the first processor opens
the file.  All other processors send their
data to the first processor to print.


The available formats include

- ***`PETSC_VIEWER_DEFAULT` -*** standard output (default)
- ***`PETSC_VIEWER_ASCII_INFO_DETAIL` -*** more verbose output for `SNESNASM`


The user can open an alternative visualization context with
`PetscViewerASCIIOpen()` - output to a specified file.

In the debugger you can do "call `SNESView`(snes,0)" to display the `SNES` solver. (The same holds for any PETSc object viewer).


## See Also
 [](ch_snes), `SNES`, `SNESLoad()`, `SNESCreate()`, `PetscViewerASCIIOpen()`

## Level
beginner

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/composite/snescomposite.c.html#SNESView_Composite">SNESView_Composite in src/snes/impls/composite/snescomposite.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/fas/fas.c.html#SNESView_FAS">SNESView_FAS in src/snes/impls/fas/fas.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/gs/snesgs.c.html#SNESView_NGS">SNESView_NGS in src/snes/impls/gs/snesgs.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ls/ls.c.html#SNESView_NEWTONLS">SNESView_NEWTONLS in src/snes/impls/ls/ls.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ms/ms.c.html#SNESView_MS">SNESView_MS in src/snes/impls/ms/ms.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/multiblock/multiblock.c.html#SNESView_Multiblock">SNESView_Multiblock in src/snes/impls/multiblock/multiblock.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/nasm/nasm.c.html#SNESView_NASM">SNESView_NASM in src/snes/impls/nasm/nasm.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ncg/snesncg.c.html#SNESView_NCG">SNESView_NCG in src/snes/impls/ncg/snesncg.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ngmres/snesngmres.c.html#SNESView_NGMRES">SNESView_NGMRES in src/snes/impls/ngmres/snesngmres.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ntrdc/ntrdc.c.html#SNESView_NEWTONTRDC">SNESView_NEWTONTRDC in src/snes/impls/ntrdc/ntrdc.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/patch/snespatch.c.html#SNESView_Patch">SNESView_Patch in src/snes/impls/patch/snespatch.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/qn/qn.c.html#SNESView_QN">SNESView_QN in src/snes/impls/qn/qn.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/richardson/snesrichardson.c.html#SNESView_NRichardson">SNESView_NRichardson in src/snes/impls/richardson/snesrichardson.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/shell/snesshell.c.html#SNESView_Shell">SNESView_Shell in src/snes/impls/shell/snesshell.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/tr/tr.c.html#SNESView_NEWTONTR">SNESView_NEWTONTR in src/snes/impls/tr/tr.c</A><BR>


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