[petsc-users] How to dump the nonzero entries of matrix into a file?

hxie at umn.edu hxie at umn.edu
Wed Dec 30 11:50:07 CST 2009

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Hi,

I am trying to dump the nonzero entries of matrix into a file. I did the 
following:
-----
       call 
PetscViewerBinaryOpen(PETSC_COMM_WORLD,"matrix.dat",FILE_MODE_WRITE,viewer,pterr)
        call MatView(ptMat,viewer,pterr)
-----

Is that correct? The file has a very large size.

Bests,
Hui

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