Dear all,
I have a matrix written by using PETSc in a Binary file, and I am trying
work with it in my dealii environment. For this, I read a system matrix
from PETSc:
Mat M_read;
PetscViewerBinaryOpen(PETSC_COMM_WORLD,file.c_str (),FILE_MODE_READ,&fd);
MatCreate(PETSC_COMM_WORLD, &M_read);
MatSetOptionsPrefix( M_read,"m_");
MatSetFromOptions( M_read );
MatLoad( local_M ,fd);
PetscViewerDestroy(&fd);
MatGetSize( M_read ,&mm,&nn);
MatGetInfo( M_read ,MAT_LOCAL,&matinfo);
printf("matinfo.nz_used %g\n", matinfo.nz_used);
and I would like to initialize a *dealii PETScWrappers::SparseMatrix *by
using *M_read*.
If I try the naĩve way:
PETScWrappers::SparseMatrix M = PETScWrappers::SparseMatrix (M_read);
I get the error:
error: ‘dealii::PETScWrappers::SparseMatrix::SparseMatrix(const
dealii::PETScWrappers::SparseMatrix&)’ is private
SparseMatrix(const SparseMatrix &);
I know the *PETScWrappers::SparseMatrix* contains the protected member *Mat
matrix*, but I quite don't know how to copy it to initialize *M*.
Is there a way to achieve this? any help is appreciated!
Thanks in advance,
Juan Carlos Araújo,
Umeå Universitet
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