[petsc-users] MatViewAndMatlabLoad

[Jed Brown]

Oo       <wumeng07maths at qq.com> writes:

> Dear All,
>
>
> I met a problem about using "load()" function in Matlab to read a m file which describes a PETSc Mat object by :
>  //Save coeff_matrix as a matlab file PetscViewer viewer; PetscViewerASCIIOpen(PETSC_COMM_WORLD,"CoeffMatrixFileName.m",&viewer); PetscViewerSetFormat(viewer, PETSC_VIEWER_ASCII_MATLAB); MatView(coeff_matrix, viewer); PetscViewerDestroy(&viewer);
> In Matlab, I used:M=load("CoeffMatrixFileName.m") and I got an error.The error is:???Error using ===> loadNumber of columns on line 2 of ASCII file CoeffMatrixFileName.m must be the same as previous lines.

What does the file look like?

Note that we recommend using a binary viewer and

  A = PetscBinaryRead('binaryoutput')

to read in MATLAB.  It is more accurate and much faster.

> Do you know how to deal with that error?Or Do you think there is some a mistake in my output of PETSc Mat Obj with the PetscViewer? 
> Thank you~:)
> Meng
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