:orphan:
# DMTSSetSolutionFunction
set `TS` solution evaluation function 
## Synopsis
```
#include "petscts.h" 
PetscErrorCode DMTSSetSolutionFunction(DM dm, TSSolutionFunction func, void *ctx)
```
Not Collective


## Input Parameters

- ***dm -*** `DM` to be used with `TS`
- ***func -*** solution function evaluation routine
- ***ctx -*** context for solution evaluation



## Calling sequence of `f`
```none
PetscErrorCode f(TS ts, PetscReal t, Vec u, void *ctx);
```

- ***ts -*** timestep context
- ***t -*** current timestep
- ***u -*** output vector
- ***ctx -*** [optional] user-defined function context





## Note
`TSSetSolutionFunction()` is normally used, but it calls this function internally because the user context is actually
associated with the `DM`.  This makes the interface consistent regardless of whether the user interacts with a `DM` or
not. If `DM` took a more central role at some later date, this could become the primary method of setting the residual.


## See Also
 [](ch_ts), `DM`, `TS`, `DMTSSetContext()`, `TSSetFunction()`, `DMTSSetJacobian()`, `DMTSGetSolutionFunction()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmts.c.html#DMTSSetSolutionFunction">src/ts/utils/dmts.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/utils/dmts.c)


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