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<div class="moz-cite-prefix">Am 10.10.2012 18:57, schrieb Dmitry
Karpeev:<br>
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<blockquote
cite="mid:CA+Y_9ULhns_+UwEc8QkUqjq1jvJogYAHZzPSfcLFo1dyYu+UDA@mail.gmail.com"
type="cite">There is this commit from last summer: <a
moz-do-not-send="true"
href="http://petsc.cs.iit.edu/petsc/petsc-dev/rev/5289fd118d48">http://petsc.cs.iit.edu/petsc/petsc-dev/rev/5289fd118d48</a>
<div class="gmail_quote">
<div>It's untested, but I pushed it back then hoping someone
could beat it into shape.</div>
<div>I also have a patch that eliminates ISAllGather() in favor
of PetscSF operations, but that's even</div>
<div>less tested (if such a thing is possible). I can clean it
up and push, if somebody wants to play with it.</div>
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I think, this will help me to make something working for my case,
thanks!<br>
<br>
Thomas<br>
<blockquote
cite="mid:CA+Y_9ULhns_+UwEc8QkUqjq1jvJogYAHZzPSfcLFo1dyYu+UDA@mail.gmail.com"
type="cite">
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<div><br>
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<div>Dmitry.</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<span class="HOEnZb"><font color="#888888"><br>
Barry<br>
</font></span>
<div class="HOEnZb">
<div class="h5"><br>
<br>
<br>
<br>
><br>
> On Oct 10, 2012 8:45 AM, "Thomas Witkowski" <<a
moz-do-not-send="true"
href="mailto:thomas.witkowski@tu-dresden.de">thomas.witkowski@tu-dresden.de</a>>
wrote:<br>
> You are right. But what if a have a MATNEST and i
must convert it to MATAIJ. Any better way than what I
wrote in my first mail?<br>
><br>
> Thomas<br>
><br>
> Am 10.10.2012 15:33, schrieb Jed Brown:<br>
>> The best way, by far, is to assemble the matrix
as AIJ if that is what you want to use. See
MatGetLocalSubMatrix and SNES ex28. Using MATNEST should
he a run-time choice.<br>
>><br>
>> On Oct 10, 2012 8:30 AM, "Thomas Witkowski" <<a
moz-do-not-send="true"
href="mailto:thomas.witkowski@tu-dresden.de">thomas.witkowski@tu-dresden.de</a>>
wrote:<br>
>> Is there a fast way to convert a MatNest to a
MatAIJ? I tried to use MatConvert, but it seems that this
convert is not yet implemented. As I need this
functionality to factorize the nested matrix with MUMPS,
is there any better way than to extract the nested
matrices, iterate over all rows of these matrices and use
MatSetValues to add them again to the final MatAIJ?<br>
>><br>
>> Thomas<br>
><br>
<br>
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