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# PetscDrawHGGetAxis
Gets the axis context associated with a histogram. This is useful if one wants to change some axis property, such as labels, color, etc. The axis context should not be destroyed by the application code. 
## Synopsis
```
#include "petscdraw.h" 
#include "petscsys.h" 
#include "petscviewer.h" 
PetscErrorCode PetscDrawHGGetAxis(PetscDrawHG hist, PetscDrawAxis *axis)
```
Not Collective, axis is parallel if hist is parallel


## Input Parameter

- ***hist -*** The histogram context



## Output Parameter

- ***axis -*** The axis context





## See Also
 `PetscDrawHG`, `PetscDrawAxis`, `PetscDrawHGCreate()`, `PetscDrawHGAddValue()`, `PetscDrawHGView()`, `PetscDrawHGDraw()`, `PetscDrawHGSetColor()`, `PetscDrawAxis`, `PetscDrawHGSetLimits()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/draw/utils/hists.c.html#PetscDrawHGGetAxis">src/sys/classes/draw/utils/hists.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/classes/draw/utils/hists.c)


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