#include "petscvec.h" PetscErrorCode VecSetRandom(Vec x,PetscRandom rctx)Logically Collective on Vec
| x | - the vector | |
| rctx | - the random number context, formed by PetscRandomCreate(), or NULL and it will create one internally. | 
| x | - the vector | 
     PetscRandomCreate(PETSC_COMM_WORLD,&rctx);
     VecSetRandom(x,rctx);
     PetscRandomDestroy(&rctx);