output to matlab readable format

[Yixun Liu]

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.