Actual source code: ex31.c

petsc-3.7.4 2016-10-02
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  1: static const char help[] = "Demonstrates PetscMatlabEngineXXX()\n";

  3: #include <petscvec.h>
  4: #include <petscmatlab.h>

  8: int main(int argc,char **argv)
  9: {
 11:   PetscMPIInt    rank;
 12:   PetscInt       n = 5;
 13:   char           *output;
 14:   Vec            x;

 16:   PetscInitialize(&argc,&argv,(char*)0,help);

 18:   VecCreate(PETSC_COMM_WORLD,&x);
 19:   VecSetSizes(x,PETSC_DECIDE,n);
 20:   VecSetFromOptions(x);

 22:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 23:   PetscMatlabEngineGetOutput(PETSC_MATLAB_ENGINE_WORLD,&output);
 24:   PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_WORLD,"MPI_Comm_rank");
 25:   PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]Processor rank is %s",rank,output);
 26:   PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);

 28:   PetscObjectSetName((PetscObject)x,"x");
 29:   PetscMatlabEnginePut(PETSC_MATLAB_ENGINE_WORLD,(PetscObject)x);
 30:   PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_WORLD,"x = x + MPI_Comm_rank;\n");
 31:   PetscMatlabEngineGet(PETSC_MATLAB_ENGINE_WORLD,(PetscObject)x);

 33:   PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_WORLD,"whos\n");
 34:   PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]The result is %s",rank,output);
 35:   PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);

 37:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);
 38:   VecDestroy(&x);
 39:   PetscFinalize();
 40:   return 0;
 41: }