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

[Hui Zhang]

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.

> 
>   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

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