[petsc-users] Create csr matrix

[Barry Smith]

On Dec 12, 2010, at 2:41 PM, Jakub Pola wrote:

> Thanks, 
> 
> Is there also so easy way to extract those arrays from already created
> matrix?

  Not particularly because we do not like the idea of directly manipulating the 
storage details of a particular sparse matrix type. But you can use 
MatGetRowIJ()/MatRestoreRowIJ() and MatGetArray() if you really want to.


> I created matrix A with function:
> MatCreateSeqAIJWithArrays(PETSC_COMM_SELF, n_rows, n_rows, r_idx, c_idx,
> vals, A);

> 
> Now I would like to extract all tables from matrix A;

   What is a "table" of a matrix A?

   Barry

> 
> 
> Dnia 2010-12-12, nie o godzinie 14:30 -0600, Barry Smith pisze:
>> MatCreateSeqAIJWithArrays
>