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:   PetscBool      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(NULL,NULL,"-test_mat_sbaij",&testsbaij);

 24:   if (testsbaij) {
 25:     MatCreateSBAIJ(PETSC_COMM_WORLD,bs,m*bs,n*bs,PETSC_DECIDE,PETSC_DECIDE,1,NULL,1,NULL,&A);
 26:   } else {
 27:     MatCreateBAIJ(PETSC_COMM_WORLD,bs,m*bs,n*bs,PETSC_DECIDE,PETSC_DECIDE,1,NULL,1,NULL,&A);
 28:   }
 29:   MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
 30:   eval = 9;

 32:   PetscOptionsHasName(NULL,NULL,"-ass_extern",&flg);
 33:   if (flg && (size != 1)) rstart = m*((rank+1)%size);
 34:   else rstart = m*(rank);

 36:   row[0] =rstart+0;  row[1] =rstart+2;
 37:   col[0] =rstart+0;  col[1] =rstart+1;  col[2] =rstart+3;
 38:   for (i=0; i<6; i++) {
 39:     for (j =0; j< 9; j++) x[i][j] = (PetscScalar)val++;
 40:   }

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



 46:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 47:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 49:   /*
 50:   This option does not work for rectangular matrices
 51:   MatSetOption(A,MAT_NEW_NONZERO_LOCATION_ERR,PETSC_TRUE);
 52:   */

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

 56:   /* Do another MatSetValues to test the case when only one local block is specified */
 57:   for (i=0; i<3; i++) {
 58:     for (j =0; j<3; j++) y[i][j] = (PetscScalar)(10 + i*eval + j);
 59:   }
 60:   MatSetValuesBlocked(A,1,row,1,col,&y[0][0],INSERT_VALUES);
 61:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 62:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);


 65:   PetscOptionsHasName(NULL,NULL,"-zero_rows",&flg);
 66:   if (flg) {
 67:     col[0] = rstart*bs+0;
 68:     col[1] = rstart*bs+1;
 69:     col[2] = rstart*bs+2;
 70:     MatZeroRows(A,3,col,one,0,0);
 71:   }

 73:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 75:   MatDestroy(&A);
 76:   PetscFinalize();
 77:   return 0;
 78: }