[petsc-users] Questions about matrix operation in petsc4py

[Guangpu Zhu]

Dear Sir/Madam,

         My name is Guangpu Zhu, I met a problem when I tested the matrix operation in petsc4py.  As the following code shows, I first set all elements of the matrix to 2.0. Then, I try to set the diagonal elements of the matrix to 1.0.  However, I surprisingly found that the diagonal elements are still 2.0.  This question has confused me for a few days, so I am writing to you for help or suggestions. Attached is the test code I used. I would greatly appreciate it if you can kindly reply to me. Thank you in ad

[cid:8c058bba-e6bb-4dc5-ad0a-596e3150b21d]

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Guangpu Zhu

Research Associate,  Department of Mechanical Engineering

National University of Singapore

Personal E-mail: zhugpupc at gmail.com

Phone: (+65) 87581879
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