[petsc-users] Change entries after MatCopy

[hxie at umn.edu]

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.

Bests,
Hui