config.log in the p4est build directory. You'll need
to look into this file to find out about the cause why it thinks that the F77
compiler isn't usable.
Best
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Wolfgang Bangerth email:
display this data file so that they can show the values in
correct order just like in MATLAB.
You can do this in gnuplot:
set style data lines
set hidden3d
splot "M.gnuplot" using 1:2:3
Best
W.
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----
Wol
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l
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this
function (as far as I can see) doesn't actually do any i/o. Can you get a
backtrace to where the problem with the error above actually happens?
Best
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term?
Best
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community would agree with this.
Best
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st
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l.II.
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quadrature point data. Then you need a separate
(second) SolutionTransfer object for the second DoFHandler.
Best
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mode.
Daniel,
you are looking for the SynchronousIterator class :-)
Cheers
W.
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For
distance of the crack). This is what is done in step-1, for example.
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efficient and independent of the overall
size of the problem.
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The
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s good!
Best
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ss has already taken its address, and so
you get the error above.
What you need to do is use the second template argument of the MappingFEField
class and set it to TrilinosWrappers::MPI::Vector. This should make it all work!
Best
Wolfgang
--
-
2, 2> const&,
dealii::TrilinosWrappers::MPI::Vector const&, dealii::ComponentMask)",
referenced from:
_main in main.cc.o
Indeed. You need this patch:
https://github.com/dealii/dealii/pull/2717
Best
W.
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--
You can try to make it work by not running multiple compilers in parallel
(with -jN), or by closing other programs that are running at the time, or by
adding swap space.
Best
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?
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2Xl2-E8Tbg0or5hD9WqUYXEKaSyPYc&s=g6gaCUE0kHiyFVTtZYEm3loEhpwmQKH7FkZCX1J1OIE&e=>.
I was totally confused. Which one is right?
It seems to me that both of these texts describe what the functions do. But
they do different things. I think the first one does the correct th
by seeing which functions are being
called. Once you find out which function creates the problem, you can
again look at the arguments and local variables and see what is happening.
Best
W.
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st
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matrices.
Another line of investigation would be to try something like an ILU as
preconditioner, to make sure again that it really is the preconditioner,
not the matrix, that is the problem.
Best
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Wolfgang Bangerth
that's not how this
currently works with p::d::Triangulation (which has a much more complicated
scheme). So I'm not sure how much making such a function virtual would
actually help.
Best
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----
Wolfgang Bangerth
For reference, I posted a patch for this problem here:
https://github.com/dealii/dealii/pull/2804
A discussion of what is happening is here:
https://github.com/dealii/dealii/issues/2661
Thanks for the nice and small testcase!
W.
On Wednesday, June 1, 2016 at 1:10:45 AM UTC-5, Jean-Paul Pelter
ut without --download-mpich.
Best
W.
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.
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i" or "mpich"?
> Is my inteperetation of the instructions correct, or do I have to
> remove openmpi-dev.
I'd try to start from as clean a slate as possible every time.
Best
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----
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.)
Best
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mesh has a few cells that are degenerate or inverted.
The error message is, admittedly, not very useful. I'll write a patch.
Best
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On 07/15/2016 07:56 AM, Michał Wichrowski wrote:
I think it would be helpful if there was something about it in
documentation.
Good point -- see https://github.com/dealii/dealii/pull/2836
Cheers
W>
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----
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hat 2*pi*r factor in the integral. As long as you make sure all of the
terms you integrate have the appropriate scaling, you will be fine.
Best
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ues);
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and submit a pull request for your
changes?
I've opened the following pull request for this:
https://github.com/dealii/dealii/pull/2854
Best
W.
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----
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Your answers clarified by doubt and thanks Wolfgang for updating it already.
I realize now that the same issue also applies to MappingCollection. Will fix
in a follow-up patch.
Best
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Wolfgang Bangerth
ument of the local assembly function to
active_cell_iterator and it should all work.
Best
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www: http://www.math.
.
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n offer from afar...
Best
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On 07/27/2016 01:43 PM, Alexander wrote:
step-17 claims to solve same problem as step-8. If one produces symmetry
matrix and the other does not or both do not -- this is suspicious.
The reason why the matrix in step-17 is not symmetric is actually
explained in the code:
// The last argu
n Release mode is good enough.
OK, good to know that you have an alternative way to work.
Best
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ant me to.
Best
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like
to add a comment to this effect to the program.
Best
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The de
On 07/31/2016 05:16 AM, Daniel Arndt wrote:
I will create a PR next week including some more references to the analysis
for that scheme.
That would be much appreciated! Thanks!
W.
--
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computations. This is pretty high on our list to get implemented in parallel.
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www: http
ipate.html
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* 54 distinct people contributed code and documentation over the last
year.
I am particularly proud of the last number!
Cheers
W.
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On 08/02/2016 12:45 PM, Marek Čapek wrote:
I coded it in the step-40 like manner.
When I run it on one core (either ./main or mpirun -np 1 main ), the
results are physically reasonable.
However, when I switch to more cores, e.g. two - "mpirun -np 2 main", I
get meaningless solutions.
You know, t
On 08/02/2016 02:33 PM, David Wells wrote:
About a year ago I did a bit of analysis on the commit rate: it has gone
up significantly over the least few years. Just for fun I attached a
plot of the total number of commits over time (as well as some important
points in our history) to visualize th
On 08/02/2016 02:18 PM, Vinetou Incucuna wrote:
I have tried to output the solutions from the step one as
well as from the step three. There is some development, but
reasonable,i.e. solution from the first step and the third step look
similar (except the first iteration)
In the attachment you ca
ency comes from.
Also, it appears that the efficiency with one CPU decreases as the #DOF
increase with PETSc/MPI. Does anyone know why?
How do you define "efficiency"?
Best
W.
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----
Wolfgang Bangert
erations that are not parallelized
take longer than those that are parallelized, and so overall lead to a lower
average thread load.
But that's only a theory that would require a lot more digging to verify.
Best
W.
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----
re just not good enough to really compete with the more complex algorithms
(which are then harder to parallelize efficiently).
Best
W.
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----
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On 08/08/2016 02:18 PM, Denis Davydov wrote:
However, when I changed the partition into something like
{ 0, 2, 4, ... } , { 1, 3, 5, ... }
it fails, which makes me believe that non-contiguous partitions are
not (completely) supported by dealii or trilinos
should be fine for Tr
will then be in the next release as well, of course.
Best
Wolfgang
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gang Bangerth
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For mai
On 08/15/2016 02:46 PM, Ignacio Tomas wrote:
Great! Many thanks for solving this problem. I owe at least a lunch.
Ah, now I'm jealous I left this easy to fix bug to Timo! ;-)
Cheers
W.
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o know about.
Cheers
W.
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For mailin
_X
On the left hand side, this results in a mass matrix that you will have
to invert to obtain the mean curvature.
Best
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it -- expect
things to come back up online in the (hopefully) not too far future.
Best
Wolfgang
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Colorado/USA.
Of course, development of deal.II in reality happens around the world
from quite a number of countries, and nothing about that will change!
Best
Wolfgang
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ehow).
Best
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For m
of data.
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, 24, 25, 26 does this.
Best
Wolfgang
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n makes its way into
deal.II itself -- with which we'd be happy to help!)
Best
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.
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nearOperator inverse_mass_matrix is not just an ordinary
dealii::Matrix that I can then apply to dealii::Vectors.
Well, is system_rhs nonzero?
Best
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You may find the glossary entry linked to above useful, or maybe not. We
would be quite happy to take any updated text if you find that it can be
improved!
Best
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www: ht
there? (Maybe after rewriting it
in such a way that you solve for all three components at once?)
Cheers
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www: http
ng this ( but it will have to wait until
September), thank you for asking.
That would be fantastic. Send me an off-list email when you are willing
to go forward with this!
Cheers
W.
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. You wouldn't use it for forming the product with your
overall matrix in GMRES or whatever other method you use, but you'd use
it when preconditioning.
Best
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fgang
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cated time stepping schemes
I continue to be surprised how often these lectures are watched
(collectively about 2,300 times per month). Keep it up, that's quite the
motivation to keep recording more!
Best
Wolfgang
--
---
e:
http://www.math.colostate.edu/~bangerth/videos.html
Best
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The deal.
all 'cmake .'
* compile
This should work.
For your own project, you can copy one of the existing example
directories somewhere else, then call
cmake -DDEAL_II_DIR=/where/you/installed/dealii .
and it should still work.
Best
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-------
x27;m afraid there is nothing we can help with from a distance without seeing
the solution and/or the whole code...
Cheers
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ult is pretty much what
I think you probably wanted ;-)
Cheers
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On 08/26/2016 03:49 PM, Deepak GUpta wrote:
Indeed Wolfgang is right.
Can't help but respond with a smiley ;-)
I'll count that as a win ahead of my weekend!
Cheers
W.
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use nobody knows any more how this
works. It's really an unfortunate situation we got ourselves into with this
small corner of the library.
Best
Wolfgang
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minate the
constraints you may have through other means.)
You can of course see what variants of the make_sparsity_pattern function
there are by looking here:
https://www.dealii.org/8.4.1/doxygen/deal.II/namespaceDoFTools.html
Best
W.
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.
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fgang
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::interpolate
on v(x) to get the nodal values V of v_h(x), and then add V to your solution
vector U.
I think that ought to be easier than what you suggest (though internally it
does exactly that).
Best
W.
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ells.
Is there anyway for me to show the inside of the calculated result to my boss?
Use cutplanes, cutspheres, thresholds, etc., to cut away some cells while
showing the others.
Best
Wolfgang
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----
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On 09/05/2016 06:29 AM, hanks0...@gmail.com wrote:
Not theta=x/y in my code but theta=atan(x/y)
You will at least want to use the atan2 function to prevent the division by
zero here.
Best
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--
Wolfgang Bangerth
s not. For example, for x=0, y=1, you have
r=1
theta=pi/2
cos(theta)=0
K_inv[0,0] = 2/0
You need to think about what you want to do with this situation.
Best
W.
--
----
Wolfgang Bangerth ema
cells resulting from
meshing of the first cylinder and the second. I believe it is the problem,
which causes program crashes.
Can you describe how exactly it "crashes"? There are so many possibilities...
Best
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----
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.
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o talk to the people who wrote
gmsh what this is supposed to mean.
Best
Wolfgang
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, both need to know about it.
Q3. What happens when the processor 2 calls the same thing but in the other
order ?
Bad things. Don't do it :-)
Best
Wolfgang
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way
is the result wrong?
Best
Wolfgang
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ize.pl
VERBATIM
)
We here call "perl -pi ".
Best
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For mailing
or on which both these two dofs lie.
Am I right here ?
Correct.
W.
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o create a pull request
from your code-gallery fork against the code-gallery master repository.
Does this help?
Cheers
W.
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have to be
more specific.
Best
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imply nothing you can do about this -- it's not
a question how you *compute* it, it's that that's what the *model* says. If
you don't like it, you need to start thinking about whether that's the
*correct model*!
Best
W.
--
--
ook at the main() function of
ASPECT, for example:
https://github.com/geodynamics/aspect/blob/master/source/main.cc
lines 452-490.
Best
Wolfgang
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in the .inst file, which is #included in the .cc file.
Best
Wolfgang
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