[petsc-users] Change entries after MatCopy

[hxie at umn.edu]

On May 13 2010, hxie at umn.edu wrote:

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>>On 12 May 2010 19:18,  <hxie at umn.edu> wrote:
>>> Hi,
>>>
>>> If I use MatCopy to get a new matrix, can i use MatSetValues to change 
>>> some
>>> entries of that matrix and do the assemble after that? Or if I just 
>>> need to
>>> change some diagonal entries, can I use MatDiagonalSet to change the 
>>> entries
>>> without assembling? Thanks.
>>>
>>
>>Yes and Yes.
>
>The first way does no work. I will try the second way.

Sorry. I made a mistake in the variable declaration. The first way works. 
Thanks.

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