[petsc-users] Change entries after MatCopy

[hxie at umn.edu]

>
>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.

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