<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="font-family: Times; "><pre>Hi all,</pre><pre>When using</pre><pre>PetscErrorCode VecScatterCreate(Vec xin,IS ix,Vec yin,IS iy,VecScatter *newctx)</pre><pre>I want to add those values of xin to the original values of yin.</pre><pre>Is there a way to do this without copy of yin?</pre><pre>Thanks!</pre><pre>Hui</pre></span><div><br></div></body></html>