[petsc-users] VecScatter in 'add' mode?

[Matthew Knepley]

On Wed, Sep 28, 2011 at 4:05 PM, Hui Zhang <mike.hui.zhang at hotmail.com>wrote:

>
> On Sep 28, 2011, at 5:58 PM, Matthew Knepley wrote:
>
> On Wed, Sep 28, 2011 at 3:54 PM, Hui Zhang <mike.hui.zhang at hotmail.com>wrote:
>
>> Hi all,
>>
>> When using
>>
>> PetscErrorCode  VecScatterCreate(Vec xin,IS ix,Vec yin,IS iy,VecScatter *newctx)
>>
>> I want to add those values of xin to the original values of yin.
>>
>> Is there a way to do this without copy of yin?
>>
>> I am not sure what you mean here. Do you want xin == yin?
>
>
> No, I mean part of xin is going to be added to part of yin.
>

Alright. We do not make a copy of yin.

   Matt



>   Matt
>
>
>> Thanks!
>>
>> Hui
>>
>> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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