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# DMPlexGlobalVectorView
Saves a global vector 
## Synopsis
```
#include "petscdmplex.h"   
PetscErrorCode DMPlexGlobalVectorView(DM dm, PetscViewer viewer, DM sectiondm, Vec vec)
```
Collective


## Input Parameters

- ***dm        -*** The `DM` that represents the topology
- ***viewer    -*** The `PetscViewer` to save data with
- ***sectiondm -*** The `DM` that contains the global section on which vec is defined
- ***vec       -*** The global vector to be saved





## Notes
In general dm and sectiondm are two different objects, the former carrying the topology and the latter carrying the section, and have been given a topology name and a section name, respectively, with `PetscObjectSetName()`. In practice, however, they can be the same object if it carries both topology and section; in that case the name of the object is used as both the topology name and the section name.


## Typical calling sequence
```none
       DMCreate(PETSC_COMM_WORLD, &dm);
       DMSetType(dm, DMPLEX);
       PetscObjectSetName((PetscObject)dm, "topologydm_name");
       DMClone(dm, &sectiondm);
       PetscObjectSetName((PetscObject)sectiondm, "sectiondm_name");
       PetscSectionCreate(PETSC_COMM_WORLD, &section);
       DMPlexGetChart(sectiondm, &pStart, &pEnd);
       PetscSectionSetChart(section, pStart, pEnd);
       PetscSectionSetUp(section);
       DMSetLocalSection(sectiondm, section);
       PetscSectionDestroy(&section);
       DMGetGlobalVector(sectiondm, &vec);
       PetscObjectSetName((PetscObject)vec, "vec_name");
       DMPlexTopologyView(dm, viewer);
       DMPlexSectionView(dm, viewer, sectiondm);
       DMPlexGlobalVectorView(dm, viewer, sectiondm, vec);
       DMRestoreGlobalVector(sectiondm, &vec);
       DMDestroy(&sectiondm);
       DMDestroy(&dm);
```



## See Also
 [](ch_unstructured), `DM`, `DMPLEX`, `DMPlexTopologyView()`, `DMPlexSectionView()`, `DMPlexLocalVectorView()`, `DMPlexGlobalVectorLoad()`, `DMPlexLocalVectorLoad()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plex.c.html#DMPlexGlobalVectorView">src/dm/impls/plex/plex.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/plex/plex.c)


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