[petsc-users] how to visualize the matordering?

[Klaij, Christiaan]

Thanks Barry, that works fine. Any chance to access the reordered matrix behind the plot?

Chris

________________________________________
From: Barry Smith <bsmith at petsc.dev>
Sent: Tuesday, September 10, 2024 3:09 PM
To: Klaij, Christiaan
Cc: petsc-users at mcs.anl.gov
Subject: Re: [petsc-users] how to visualize the matordering?

You don't often get email from bsmith at petsc.dev. Learn why this is important<https://urldefense.us/v3/__https://aka.ms/LearnAboutSenderIdentification__;!!G_uCfscf7eWS!fbUhaFTo3vSK-SuD9ZJ8eCD-wcGaA2dp_iFxbwerHHOlCS7JVWRhadkbjdVxrrInqzkq9zYDYfR4UOeiWk_xAmk$ >

   You can save the plot in an image file that does not require X. For example

    -mat_view_ordering draw:image:filename

   Several image formats are available.


   Barry


On Sep 10, 2024, at 7:36 AM, Klaij, Christiaan <C.Klaij at marin.nl> wrote:

I'm saving a petsc mat to file and loading it into python to make a spy plot of its sparsity pattern, so far so good.

Now I would like to compare with a reordened pattern, say rcm. I've notice the option -mat_view_ordering draw, but do not have X Windows on this machine. What is the recommended way to get the reordened matrix for inspection?

Chris
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