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# DMTSSetRHSFunctionLocal
set a local rhs function evaluation function. This function is called with local vector containing the local vector information PLUS ghost point information. It should compute a result for all local elements and `DM` will automatically accumulate the overlapping values.
## Synopsis
```
#include "petscts.h"
PetscErrorCode DMTSSetRHSFunctionLocal(DM dm, PetscErrorCode (*func)(DM, PetscReal, Vec, Vec, void *), void *ctx)
```
Logically Collective
## Input Parameters
- ***dm -*** `DM` to associate callback with
- ***func -*** local function evaluation
- ***ctx -*** context for function evaluation
## See Also
[](ch_ts), `DM`, `DMTSGetRHSFunctionLocal()`, `DMTSSetRHSFunction()`, `DMTSSetIFunction()`, `DMTSSetIJacobianLocal()`
## Level
beginner
## Location
src/ts/utils/dmlocalts.c
## Examples
src/ts/tutorials/ex11.c
src/ts/tutorials/ex11_sa.c
src/ts/tutorials/ex18.c
src/ts/tutorials/ex45.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/utils/dmlocalts.c)
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