output to matlab readable format

[Khan, Irfan]

I don't think so. Petsc has its own way to output matrix information in binary format that is platform independent.
However, I found that after loading into matlab, you can save or output the matrix in a format that you want.

Irfan

----- Original Message -----
From: "Yixun Liu" <enjoywm at cs.wm.edu>
To: "PETSc users list" <petsc-users at mcs.anl.gov>
Sent: Tuesday, February 24, 2009 3:39:51 PM GMT -05:00 US/Canada Eastern
Subject: Re: output to matlab readable format

Thanks!

Can I save matrix into (row, column, value) format?


Khan, Irfan wrote:
> 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
>
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> 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.
>