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# TSSetComputeInitialCondition
Set the function used to automatically compute an initial condition for the timestepping. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSSetComputeInitialCondition(TS ts, PetscErrorCode (*initCondition)(TS, Vec))
```
Logically collective


## Input Parameters

- ***ts  -*** time stepping context
- ***initCondition -*** The function which computes an initial condition



## Calling sequence of `initCondition`
```none
PetscErrorCode initCondition(TS ts, Vec u)
```

- ***ts -*** The timestepping context
- ***u  -*** The input vector in which the initial condition is to be stored





## See Also
 [](ch_ts), `TS`, `TSGetComputeInitialCondition()`, `TSComputeInitialCondition()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/ts.c.html#TSSetComputeInitialCondition">src/ts/interface/ts.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex45.c.html">src/ts/tutorials/ex45.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex53.c.html">src/ts/tutorials/ex53.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex76.c.html">src/ts/tutorials/ex76.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex77.c.html">src/ts/tutorials/ex77.c</A><BR>


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


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