output to matlab readable format

[Khan, Irfan]

You will need to open a binary file to output the data. Try the following.


       PetscViewer viewer;
       ierr   =  PetscViewerBinaryOpen(PETSC_COMM_WORLD, "matrix", FILE_MODE_WRITE, &viewer);
       ierr   =  MatView(Amat,viewer);
       PetscViewerDestroy(viewer);

In order to load the file into matlab do the following

% $PETSC_DIR/bin/matlab/PetscBinaryRead("<path_to_file>")

Irfan









Hi,
I use the following code to output matrix into file which can be read by
matlab,

PetscViewer aviewer;
      PetscViewerCreate(PETSC_COMM_WORLD, &aviewer);
      PetscViewerSetType(aviewer, PETSC_VIEWER_ASCII);
      //PetscObjectSetName((PetscObject)sparseMechanicalStiffnessMatrix,
aname);
      PetscViewerSetFormat(aviewer, PETSC_VIEWER_ASCII_MATLAB);
      PetscViewerFileSetName(aviewer, aname);
      MatView(sparseMechanicalStiffnessMatrix, aviewer);
      PetscViewerDestroy(aviewer);



The error is ASCII format file doesn't allow the matrix exceeds 512
rows. So I change PETSC_VIEWER_ASCII to PETSC_VIEWER_BINARY, but it seem
that PETSc outputs to screen.

Thanks.