How to get information about the off-diagonal submatrix

[Thomas Witkowski]

Thanks, that works fine! In my test case (yes, just for debugging!) I've 
expected to have an empty off-diagonal matrix. But the matrix is not 
empty. But how is it possible, when all entries, which are inserted to 
the matrix via MatSetValues, have indices for row and col within the 
ownership range of the processors matrix?

Thomas

Satish Balay wrote:
> alternatively - just access the private datastructe and print..
>
> #include "../src/mat/impls/aij/mpi/mpiaij.h"
> Mat_MPIAIJ     *mpiaij = (Mat_MPIAIJ*)mat->data;
> MatView(mpiaij->B,...);
>
>
> Satish
>
>
> On Mon, 10 Aug 2009, Matthew Knepley wrote:
>
>   
>> If this is just for debugging, the easiest way I think is to call
>> MatGetSubmatrix() with
>> a column IS that omits the local columns.
>>
>>   Matt
>>
>> On Mon, Aug 10, 2009 at 8:28 AM, Thomas Witkowski <
>> thomas.witkowski at tu-dresden.de> wrote:
>>
>>     
>>> Hi,
>>>
>>> how is it possible to print just the off-diagonal submatrix of one process
>>> of a parallel mpiaij matrix?
>>>
>>> Thomas
>>>
>>>       
>>
>>
>>     
>
>
>
>