how to sum two matrices?

[Yujie]

:). thanks, Barry

On Wed, Dec 17, 2008 at 1:37 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>  If PETSc  had a function that does a direct sum as you requested I would
> have told you.
> Just do a copy, a scale and then an MatAXPY()
>
>   Barry
>
> On Dec 17, 2008, at 3:33 PM, Yujie wrote:
>
>  Hi, Barry
>>
>> I want to do A=a1A1+a2A2. MatAXPY is just for Y = a*X + Y. Though I can
>> realize my application, it is not good. Do you have direct function for my
>> application? thanks a lot.
>>
>> Regards,
>>
>> Yujie
>>
>>
>> On Wed, Dec 17, 2008 at 1:17 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>>
>>  MatAXPY()
>>
>>
>> On Dec 17, 2008, at 3:02 PM, Yujie wrote:
>>
>> Hi,
>>
>> I have matrices A1 and A2. It is distributed in the cluster. Their
>> distribution is same
>>
>> I want to do A=a1A1+a2A2. How to do it? I can't find the suitble function.
>> thanks a lot.
>>
>> Regards,
>>
>> Yujie
>>
>>
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20081217/b35c5fd7/attachment.htm>