:orphan:
# PetscSectionSetFieldComponents
Sets the number of field components for the given field. 
## Synopsis
```
#include "petscsection.h"   
PetscErrorCode PetscSectionSetFieldComponents(PetscSection s, PetscInt field, PetscInt numComp)
```
Not Collective


## Input Parameters

- ***s -*** the `PetscSection`
- ***field -*** the field number
- ***numComp -*** the number of field components





## Note
This number can be different than the values set with `PetscSectionSetFieldDof()`. It can be used to indicate the number of
components in the field of the underlying physical model which may be different than the number of degrees of freedom needed
at a point in a discretization. For example, if in three dimensions the field is velocity, it will have 3 components, u, v, and w but
an face based model for velocity (where the velocity normal to the face is stored) there is only 1 dof for each face point.

The value set with this function are not needed or used in `PetscSectionSetUp()`.


## Developer Note
This function is misnamed. There is a Num in `PetscSectionSetNumFields()` but not in this name


## See Also
 [PetscSection](sec_petscsection), `PetscSection`, `PetscSectionGetFieldComponents()`, `PetscSectionSetComponentName()`,
`PetscSectionGetComponentName()`, `PetscSectionGetNumFields()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/section/interface/section.c.html#PetscSectionSetFieldComponents">src/vec/is/section/interface/section.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex7.c.html">src/dm/impls/plex/tutorials/ex7.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11_sa.c.html">src/ts/tutorials/ex11_sa.c</A><BR>


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


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