Actual source code: ex234.c

  1: static char help[] = "Basic test of various routines with SBAIJ matrices\n\n";

  3: #include <petscmat.h>

  5: int main(int argc,char **argv)
  6: {
  7:   PetscInt       ia[3]={0,2,4};
  8:   PetscInt       ja[4]={0,1,0,1};
  9:   PetscScalar    c[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
 10:   PetscMPIInt    size;
 11:   Mat            ssbaij,msbaij;
 12:   Vec            x,y;

 14:   PetscInitialize(&argc,&argv,NULL,help);
 15:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 17:   MatCreate(PETSC_COMM_SELF,&ssbaij);
 18:   MatSetType(ssbaij,MATSEQSBAIJ);
 19:   MatSetBlockSize(ssbaij,2);
 20:   MatSetSizes(ssbaij,4,8,4,8);
 21:   MatSeqSBAIJSetPreallocationCSR(ssbaij,2,ia,ja,c);
 22:   MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,ssbaij,PETSC_DECIDE,MAT_INITIAL_MATRIX,&msbaij);
 23:   MatView(msbaij,PETSC_VIEWER_STDOUT_WORLD);
 24:   MatDestroy(&msbaij);
 25:   MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,ssbaij,4,MAT_INITIAL_MATRIX,&msbaij);
 26:   MatView(msbaij,PETSC_VIEWER_STDOUT_WORLD);
 27:   MatCreateVecs(msbaij,&x,&y);
 28:   VecSet(x,1);
 29:   MatMult(msbaij,x,y);
 30:   VecView(y,PETSC_VIEWER_STDOUT_WORLD);
 31:   MatMultAdd(msbaij,x,x,y);
 32:   VecView(y,PETSC_VIEWER_STDOUT_WORLD);
 33:   MatGetDiagonal(msbaij,y);
 34:   VecView(y,PETSC_VIEWER_STDOUT_WORLD);
 35:   VecDestroy(&x);
 36:   VecDestroy(&y);
 37:   MatDestroy(&msbaij);
 38:   MatDestroy(&ssbaij);
 39:   PetscFinalize();
 40:   return 0;
 41: }

 43: /*TEST

 45:    test:
 46:      nsize: 2
 47:      filter: sed "s?\.??g"

 49: TEST*/