2: static char help[] = "Test the use of MatSetValuesBlocked(), MatZeroRows() for rectangular MatBAIJ matrix, test MatSetValuesBlocked() for MatSBAIJ matrix (-test_mat_sbaij).";

 4:  #include petscmat.h

  8: int main(int argc,char **args)
  9: {
 10:   Mat            A;
 11:   PetscInt       bs=3,m=4,n=6,i,j,val = 10,row[2],col[3],eval,rstart;
 13:   PetscMPIInt    size,rank;
 14:   PetscScalar    x[6][9],y[3][3],one=1.0;
 15:   PetscTruth     flg,testsbaij=PETSC_FALSE;

 17:   PetscInitialize(&argc,&args,(char *)0,help);

 19:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 20:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);

 22:   PetscOptionsHasName(PETSC_NULL,"-test_mat_sbaij",&testsbaij);
 23: 
 24:   if (testsbaij){
 25:     if (size == 1) {
 26:       MatCreateSeqSBAIJ(PETSC_COMM_SELF,bs,m*bs,n*bs,1,PETSC_NULL,&A);
 27:     } else {
 28:       MatCreateMPISBAIJ(PETSC_COMM_WORLD,bs,m*bs,n*bs,PETSC_DECIDE,PETSC_DECIDE,1,
 29:                             PETSC_NULL,1,PETSC_NULL,&A);
 30:     }
 31:   } else {
 32:     if (size == 1) {
 33:       MatCreateSeqBAIJ(PETSC_COMM_SELF,bs,m*bs,n*bs,1,PETSC_NULL,&A);
 34:     } else {
 35:       MatCreateMPIBAIJ(PETSC_COMM_WORLD,bs,m*bs,n*bs,PETSC_DECIDE,PETSC_DECIDE,1,
 36:                             PETSC_NULL,1,PETSC_NULL,&A);
 37:     }
 38:   }
 39:   PetscOptionsHasName(PETSC_NULL,"-column_oriented",&flg);
 40:   if (flg) {
 41:     MatSetOption(A,MAT_COLUMN_ORIENTED);
 42:     eval = 6;
 43:   } else {
 44:     eval = 9;
 45:   }

 47:   PetscOptionsHasName(PETSC_NULL,"-ass_extern",&flg);
 48:   if (flg && (size != 1))    rstart = m*((rank+1)%size);
 49:   else                       rstart = m*(rank);

 51:   row[0] =rstart+0;  row[1] =rstart+2;
 52:   col[0] =rstart+0;  col[1] =rstart+1;  col[2] =rstart+3;
 53:   for (i=0; i<6; i++) {
 54:     for (j =0; j< 9; j++) x[i][j] = (PetscScalar)val++;
 55:   }

 57:   MatSetValuesBlocked(A,2,row,3,col,&x[0][0],INSERT_VALUES);



 61:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 62:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 64:   /*
 65:   This option does not work for rectangular matrices
 66:   MatSetOption(A,MAT_NEW_NONZERO_LOCATION_ERR);
 67:   */
 68: 
 69:   MatSetValuesBlocked(A,2,row,3,col,&x[0][0],INSERT_VALUES);

 71:   /* Do another MatSetValues to test the case when only one local block is specified */
 72:   for (i=0; i<3; i++) {
 73:     for (j =0; j<3 ; j++)  y[i][j] = (PetscScalar)(10 + i*eval + j);
 74:   }
 75:   MatSetValuesBlocked(A,1,row,1,col,&y[0][0],INSERT_VALUES);
 76:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 77:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 79: 
 80:   PetscOptionsHasName(PETSC_NULL,"-zero_rows",&flg);
 81:   if (flg) {
 82:     col[0] = rstart*bs+0;
 83:     col[1] = rstart*bs+1;
 84:     col[2] = rstart*bs+2;
 85:     MatZeroRows(A,3,col,one);
 86:   }

 88:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 90:   MatDestroy(A);
 91:   PetscFinalize();
 92:   return 0;
 93: }