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# PetscDrawLGCreate
Creates a line graph data structure. 
## Synopsis
```
#include "petscdraw.h"  
PetscErrorCode PetscDrawLGCreate(PetscDraw draw, PetscInt dim, PetscDrawLG *outlg)
```
Collective


## Input Parameters

- ***draw -*** the window where the graph will be made.
- ***dim -*** the number of curves which will be drawn



## Output Parameter

- ***outlg -*** the line graph context





## Notes
The MPI communicator that owns the `PetscDraw` owns this `PetscDrawLG`, but the calls to set options and add points are ignored on all processes except the
zeroth MPI process in the communicator.

All MPI ranks in the communicator must call `PetscDrawLGDraw()` to display the updated graph.


## See Also
 `PetscDrawLGCreate`, `PetscDrawLGDestroy()`, `PetscDrawLGAddPoint()`, `PetscDrawLGAddCommonPoint()`, `PetscDrawLGAddPoints()`, `PetscDrawLGDraw()`, `PetscDrawLGSave()`,
`PetscDrawLGView()`, `PetscDrawLGReset()`, `PetscDrawLGSetDimension()`, `PetscDrawLGGetDimension()`, `PetscDrawLGSetLegend()`, `PetscDrawLGGetAxis()`,
`PetscDrawLGGetDraw()`, `PetscDrawLGSetUseMarkers()`, `PetscDrawLGSetLimits()`, `PetscDrawLGSetColors()`, `PetscDrawLGSetOptionsPrefix()`, `PetscDrawLGSetFromOptions()`

## Level
intermediate

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

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex68.c.html">src/ksp/ksp/tutorials/ex68.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex69.c.html">src/ksp/ksp/tutorials/ex69.c</A><BR>


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


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