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<p>Hei,</p>
<p>thanks for the offer! Both options would be a possibility. Option
one would be more specific, but I could imagine that implementing
it using SSE/AVX-functions should be easier for better throughput.
Option two would definitely be more flexible, but might loose the
advantage of being able to use SSE/AVX functions. Or do you rely
on higher-level commands for such constructions?</p>
<p>By the way, why would that make cross-language things harder?<br>
</p>
<p>Thanks,</p>
<p>regards,</p>
<p>Roland<br>
</p>
<div class="moz-cite-prefix">Am 05.01.21 um 16:34 schrieb Matthew
Knepley:<br>
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<div dir="ltr">On Tue, Jan 5, 2021 at 10:24 AM Roland Richter
<<a href="mailto:roland.richter@ntnu.no"
moz-do-not-send="true">roland.richter@ntnu.no</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hei,<br>
<br>
is there a function to square/cube etc. each element of a
matrix or<br>
vector in PETSc? It is rather useful for things like
intensity<br>
calculations (I = |E|^2), and should work also for
distributed matrices.<br>
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<div>We don't have that. We tend to shy away from functions in
the interface, since it makes cross-language</div>
<div>things hard. However,</div>
<div><br>
</div>
<div>1) I would be willing to add functions that you want,
like square or cube, if you think it will make things
easier for you.</div>
<div><br>
</div>
<div>2) We could consider adding Vec/MatPointwiseFunction(A,
f) where you apply a function f pointwise to each entry.</div>
<div><br>
</div>
<div> Thanks,</div>
<div><br>
</div>
<div> Matt</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
Thanks!<br>
<br>
Regards,<br>
<br>
Roland Richter<br>
<br>
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-- <br>
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<div>What most experimenters take for granted before
they begin their experiments is infinitely more
interesting than any results to which their
experiments lead.<br>
-- Norbert Wiener</div>
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<div><a href="http://www.cse.buffalo.edu/~knepley/"
target="_blank" moz-do-not-send="true">https://www.cse.buffalo.edu/~knepley/</a><br>
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