output to matlab

[Barry Smith]

On Feb 16, 2009, at 7:05 PM, Yixun Liu wrote:

> Hi,
> I want to output matrix and vector into matlab.
> // output a vector,
>      PetscViewer bviewer;
>      PetscViewerCreate(PETSC_COMM_WORLD, &bviewer);
>      PetscViewerSetType(bviewer, PETSC_VIEWER_ASCII);
>      PetscViewerSetFormat(bviewer, PETSC_VIEWER_ASCII_MATLAB);
>      PetscViewerFileSetName(bviewer, bname);
>      VecView(externalForcesVector, bviewer);//externalForcesVector  
> is a
> parallel vector.
>
PetscViewerDestroy(bviewer);

Run with -info to see what it says along the way.

BTW: If the matrix is large then you do not want to use an ASCII  
viewer. You want to use a binary viewer and then use
bin/matlab/PetscBinaryRead() to read the vector into Matlab.

    Barry

> However, the output file contains nothing.
>
> Thanks.
>
> Yixun
>
>