[Users] [Maintainers] New Tutorial Account Requested
Steven R. Brandt
sbrandt at cct.lsu.edu
Thu Mar 9 16:17:42 CST 2023
Dear Enzo,
CactusTutorial.ipynb shows you how to run simulations.
For example, to run interactively, it shows that you do this:
./simfactory/bin/sim create-run helloworld \
--parfile arrangements/CactusExamples/HelloWorld/par/HelloWorld.par
So create a simulation name, e.g. multipatch, and pass your parfile.
--Steve
On 3/9/2023 3:50 PM, Enzo Iubini wrote:
> Hello Steve, I'm sorry to bother but I forgot one thing.
>
> I was told that I could learn about Einstein Toolkit by running some
> done simulations and shifting parameters to see how the code works.
> I tried working with this Multipatch wave equation :
> https://einsteintoolkit.org/gallery/multipatch/index.html
>
> But I do not know how to run it. I see I have a parameter file, but
> don't I need the ccl files as well? (the schedule, init, boundary) How
> do I work with these?
>
> This would help me so much, I hope you can help me out.
>
> Best regards,
> Enzo
>
> El jue, 9 mar 2023 a las 18:38, Enzo Iubini (<egic.enzo at gmail.com>)
> escribió:
>
> Hello Steve, thanks for your thoughtful answer.
>
> Just for clarification, I just meant it was a black box for me as
> I'm still trying to understand the basics. :D
>
> So I ran all the cells once more and they didn't show anything
> different. If I could ask for a favour, could you run all the
> cells and then send me that jupyter notebook? I know the
> simulation will not run correctly on my computer but I could see
> which warnings (or lack thereof) arise when you run the code and
> maybe figure out if something is wrong with my computer, or
> anything similar.
>
> I would appreciate it very much, I've got to learn the Einstein
> Toolkit and I have no one here in Chile to help me, but I'll try
> my best this year!
>
> Thank you again, I'll wait for your answer.
>
> Best regards,
> Enzo
>
>
>
> El mié, 8 mar 2023 a las 17:59, Steven R. Brandt
> (<sbrandt at cct.lsu.edu>) escribió:
>
>
> On 3/8/2023 2:13 PM, Enzo Iubini wrote:
>> Thank you Steve!
>>
>> My problem is: the simulation gifs of the Wave Equation and
>> Heat Equation notebooks on the tutorial folder are not
>> showing correctly.
>
> So I just clicked through the heat equation notebook. The cell
> that ends with:
>
> ## play animation
> from IPython.display import HTML
> HTML(anim.to_html5_video()) #playback option 1
> #HTML(anim.to_jshtml()) #playback option 2
>
> Played an animation for me. Initially, there is a spike at the
> center of the grid, and it evolves to become flat. (It also
> printed a deprecation warning about the "close_event"
> function, whatever that is).
>
> Did you click through to this cell or did you stop at the one
> before? Because the one before it just displays a still image.
>
> The WaveEquation also worked for me by just clicking through
> the cells in order.
>
>>
>> I'm trying to understand how Cactus works, so I ran every
>> cell in the notebook while looking at the Terminal and seeing
>> how each file is created and its contents.
>> The problem comes when I finally run the simulations, which
>> take a while.
> This happens in seconds for me.
>> So after the running is complete, there's this section called
>> "Extract data from hdf5 files".
>> The files exist, as I have previously checked, but the time
>> steps array is actually a [0,0] array in the heat equation,
>> and a very random array in the wave equation.
>> In both cases, when plotting the simulations, the solution
>> does not change from the initial condition.
> Did you modify the cells from the original tutorial? Because
> this all just worked for me.
>>
>> I tried to open the data files to see if I could understand
>> what was going on but I'm unable to open these kind of files,
>> and Cactus being a black box leaves me helpless to see where
>> the mistake is coming from.
>
> So I disagree that Cactus is a black box since it is open
> source and the purpose of these tutorials is to show how it
> works... but it's a very big non-black box which can be
> overwhelming.
>
> I think your problem is the hdf5 files, not Cactus. Hdf5 is a
> file format that Cactus uses. You can open them with commands
> like h5ls, or Python's h5py library (which the notebook
> provides some examples of usage).
>
>>
>> I want to work on the problems at the end of these notebooks,
>> but not correctly seeing the solution makes me think there's
>> something wrong since the beggining, and I have not changed
>> anything else from the initial notebook.
>
> So I'm not 100% sure what's going on, but I suspect you've
> either not clicked far enough or you have modified the
> notebook. Please check and let me know.
>
> --Steve
>
>>
>> Has this happened to anyone before?
>>
>> I'm sorry for the long email, I'm very new to this software
>> and there's so much to learn! :-)
>> Thank you in advance.
>>
>> - Enzo
>>
>> El mié, 8 mar 2023 a las 14:02, Steven R. Brandt
>> (<sbrandt at cct.lsu.edu>) escribió:
>>
>> You've come to the right place. What's the problem?
>>
>> --Steve
>>
>> On 3/7/2023 7:41 PM, Enzo Iubini wrote:
>>> Hello!
>>> Thank you for approving my tutorial account.
>>>
>>> I have a small question. I'm having a bit of trouble
>>> with some tutorial notebooks, in particular the Heat
>>> Equation and Wave Equation notebooks, where the
>>> simulations are not running properly. The question is,
>>> who can I contact to get support with this? I would not
>>> want to bug you if this is not your job, but I'm a
>>> little lost and got nobody to ask for help.
>>>
>>> Thank you in advance.
>>> Greetings!
>>>
>>> Enzo Iubini
>>>
>>> El lun, 5 dic 2022 a las 13:12, Steven R. Brandt
>>> (<sbrandt at cct.lsu.edu>) escribió:
>>>
>>> Approved. :)
>>>
>>> --Steve
>>>
>>> On 12/5/2022 9:53 AM,
>>> RegistrationBot at einsteintoolkit.org wrote:
>>> > Einstein Toolkit maintainers:
>>> >
>>> > New Tutorial Request:
>>> > Name: http://orcid.org/0000-0001-9327-0832
>>> > Email: egic.enzo at gmail.com
>>> > Organization: ORCID
>>> > Why: Hello!
>>> > My name is Enzo Iubini and I'm doing my Master's
>>> degree in Applied Mathematics. I study at
>>> Universidad de Chile, and my work is about binary
>>> black holes. My proffessor has recommended me to try
>>> Einstein toolkit, but I'm having trouble
>>> understanding how to work around it, therefore I'd
>>> really like to have a tutorial account.
>>> > I do not have a homepage.
>>> >
>>> > Thanks in advance!
>>> >
>>> >
>>> > The above user has requested a tutorial account.
>>> >
>>> > Thanks,
>>> > Einstein Toolkit Registration Bot
>>> >
>>> > _______________________________________________
>>> > Maintainers mailing list
>>> > Maintainers at einsteintoolkit.org
>>> >
>>> http://lists.einsteintoolkit.org/mailman/listinfo/maintainers
>>>
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