[petsc-users] PETSC Matrix debugging

[Shatanawi, Sawsan Muhammad]

Hello Barry and Matthew,

Yes MatView is what I was looking for. Thank you for your help.

Bests,
Sawsan
________________________________
From: Barry Smith <bsmith at petsc.dev>
Sent: Monday, April 1, 2024 1:14 PM
To: Matthew Knepley <knepley at gmail.com>
Cc: Shatanawi, Sawsan Muhammad <sawsan.shatanawi at wsu.edu>; petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] PETSC Matrix debugging


[EXTERNAL EMAIL]

  Note, you can also run with the option -mat_view and it will print each matrix that gets assembled.

  Also in the debugger you can do call MatView(mat,0)



On Apr 1, 2024, at 2:18 PM, Matthew Knepley <knepley at gmail.com> wrote:

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On Mon, Apr 1, 2024 at 1:57 PM Shatanawi, Sawsan Muhammad via petsc-users <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>> wrote:
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Hello everyone,

I hope this email finds you well.

Is there a way we can check how the matrix looks like after setting it.
I have tried debugging it with gdb- break points- and print statements, but it only gave me one value instead of a matrix.

Thank you in advance for your time and assistance.

I usually use MatView(), which can print to the screen. Is that what you want?

  Thanks,

     Matt

Best regards,

 Sawsan



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What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
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