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    <p>Dear Enzo,</p>
    <p>CactusTutorial.ipynb shows you how to run simulations.</p>
    <p>For example, to run interactively, it shows that you do this:</p>
    <p>./simfactory/bin/sim create-run helloworld \<br>
          --parfile
      arrangements/CactusExamples/HelloWorld/par/HelloWorld.par</p>
    <p>So create a simulation name, e.g. multipatch, and pass your
      parfile.</p>
    <p>--Steve<br>
    </p>
    <div class="moz-cite-prefix">On 3/9/2023 3:50 PM, Enzo Iubini wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CALW_x=4JxSk7mYrz9n8PT4KpU=4aYvPUamryW50e=wq48CfT8w@mail.gmail.com">
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      <div dir="ltr">Hello Steve, I'm sorry to bother but I forgot one
        thing.
        <div><br>
        </div>
        <div>I was told that I could learn about Einstein Toolkit by
          running some done simulations and shifting parameters to see
          how the code works. </div>
        <div>I tried working with this Multipatch wave equation : <a
            href="https://einsteintoolkit.org/gallery/multipatch/index.html"
            moz-do-not-send="true" class="moz-txt-link-freetext">https://einsteintoolkit.org/gallery/multipatch/index.html</a></div>
        <div><br>
        </div>
        <div>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?</div>
        <div><br>
        </div>
        <div>This would help me so much, I hope you can help me out.</div>
        <div><br>
        </div>
        <div>Best regards, </div>
        <div>Enzo</div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">El jue, 9 mar 2023 a las
          18:38, Enzo Iubini (&lt;<a href="mailto:egic.enzo@gmail.com"
            moz-do-not-send="true" class="moz-txt-link-freetext">egic.enzo@gmail.com</a>&gt;)
          escribió:<br>
        </div>
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          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div dir="ltr">Hello Steve, thanks for your thoughtful
            answer. 
            <div><br>
              <div>Just for clarification, I just meant it was a black
                box for me as I'm still trying to understand the basics.
                :D</div>
              <div><br>
              </div>
              <div>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.</div>
            </div>
            <div><br>
            </div>
            <div>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!</div>
            <div><br>
            </div>
            <div>Thank you again, I'll wait for your answer.</div>
            <div><br>
            </div>
            <div>Best regards, </div>
            <div>Enzo</div>
            <div><br>
            </div>
            <div><br>
            </div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">El mié, 8 mar 2023 a las
              17:59, Steven R. Brandt (&lt;<a
                href="mailto:sbrandt@cct.lsu.edu" target="_blank"
                moz-do-not-send="true" class="moz-txt-link-freetext">sbrandt@cct.lsu.edu</a>&gt;)
              escribió:<br>
            </div>
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              <div>
                <p><br>
                </p>
                <div>On 3/8/2023 2:13 PM, Enzo Iubini wrote:<br>
                </div>
                <blockquote type="cite">
                  <div dir="ltr">Thank you Steve!
                    <div><br>
                    </div>
                    <div>My problem is: the simulation gifs of the Wave
                      Equation and Heat Equation notebooks on the
                      tutorial folder are not showing correctly.</div>
                  </div>
                </blockquote>
                <p>So I just clicked through the heat equation notebook.
                  The cell that ends with:</p>
                <p>## play animation<br>
                  from IPython.display import HTML<br>
                  HTML(anim.to_html5_video())  #playback option 1<br>
                  #HTML(anim.to_jshtml())       #playback option 2</p>
                <p>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).</p>
                <p>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.</p>
                <p>The WaveEquation also worked for me by just clicking
                  through the cells in order.<br>
                </p>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div><br>
                    </div>
                    <div>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. </div>
                    <div>The problem comes when I finally run the
                      simulations, which take a while. </div>
                  </div>
                </blockquote>
                This happens in seconds for me.<br>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div>So after the running is complete, there's this
                      section called "Extract data from hdf5 files".</div>
                    <div>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. </div>
                    <div>In both cases, when plotting the simulations,
                      the solution does not change from the initial
                      condition.</div>
                  </div>
                </blockquote>
                Did you modify the cells from the original tutorial?
                Because this all just worked for me.<br>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div><br>
                    </div>
                    <div>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.</div>
                  </div>
                </blockquote>
                <p>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.</p>
                <p>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).<br>
                </p>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div><br>
                    </div>
                    <div>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.</div>
                  </div>
                </blockquote>
                <p>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.</p>
                <p>--Steve<br>
                </p>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div><br>
                    </div>
                    <div>Has this happened to anyone before?</div>
                    <div><br>
                    </div>
                    <div>I'm sorry for the long email, I'm very new to
                      this software and there's so much to learn! :-)</div>
                    <div>Thank you in advance.</div>
                    <div><br>
                    </div>
                    <div>- Enzo</div>
                  </div>
                  <br>
                  <div class="gmail_quote">
                    <div dir="ltr" class="gmail_attr">El mié, 8 mar 2023
                      a las 14:02, Steven R. Brandt (&lt;<a
                        href="mailto:sbrandt@cct.lsu.edu"
                        target="_blank" moz-do-not-send="true"
                        class="moz-txt-link-freetext">sbrandt@cct.lsu.edu</a>&gt;)
                      escribió:<br>
                    </div>
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                      rgb(204,204,204);padding-left:1ex">
                      <div>
                        <p>You've come to the right place. What's the
                          problem?</p>
                        <p>--Steve<br>
                        </p>
                        <div>On 3/7/2023 7:41 PM, Enzo Iubini wrote:<br>
                        </div>
                        <blockquote type="cite">
                          <div dir="ltr">
                            <div>Hello!</div>
                            <div>Thank you for approving my tutorial
                              account.</div>
                            <div><br>
                            </div>
                            <div>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.</div>
                            <div><br>
                            </div>
                            <div>Thank you in advance.</div>
                            <div>Greetings!</div>
                            <div><br>
                            </div>
                            <div>Enzo Iubini</div>
                          </div>
                          <br>
                          <div class="gmail_quote">
                            <div dir="ltr" class="gmail_attr">El lun, 5
                              dic 2022 a las 13:12, Steven R. Brandt
                              (&lt;<a href="mailto:sbrandt@cct.lsu.edu"
                                target="_blank" moz-do-not-send="true"
                                class="moz-txt-link-freetext">sbrandt@cct.lsu.edu</a>&gt;)
                              escribió:<br>
                            </div>
                            <blockquote class="gmail_quote"
                              style="margin:0px 0px 0px
                              0.8ex;border-left:1px solid
                              rgb(204,204,204);padding-left:1ex">Approved.
                              :)<br>
                              <br>
                              --Steve<br>
                              <br>
                              On 12/5/2022 9:53 AM, <a
                                href="mailto:RegistrationBot@einsteintoolkit.org"
                                target="_blank" moz-do-not-send="true"
                                class="moz-txt-link-freetext">RegistrationBot@einsteintoolkit.org</a>
                              wrote:<br>
                              &gt; Einstein Toolkit maintainers:<br>
                              &gt;<br>
                              &gt; New Tutorial Request:<br>
                              &gt; Name: <a
                                href="http://orcid.org/0000-0001-9327-0832"
                                rel="noreferrer" target="_blank"
                                moz-do-not-send="true"
                                class="moz-txt-link-freetext">http://orcid.org/0000-0001-9327-0832</a><br>
                              &gt; Email: <a
                                href="mailto:egic.enzo@gmail.com"
                                target="_blank" moz-do-not-send="true"
                                class="moz-txt-link-freetext">egic.enzo@gmail.com</a><br>
                              &gt; Organization: ORCID<br>
                              &gt; Why: Hello!<br>
                              &gt; 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.<br>
                              &gt; I do not have a homepage.<br>
                              &gt;<br>
                              &gt; Thanks in advance!<br>
                              &gt;<br>
                              &gt;<br>
                              &gt; The above user has requested a
                              tutorial account.<br>
                              &gt;<br>
                              &gt; Thanks,<br>
                              &gt; Einstein Toolkit Registration Bot<br>
                              &gt;<br>
                              &gt;
                              _______________________________________________<br>
                              &gt; Maintainers mailing list<br>
                              &gt; <a
                                href="mailto:Maintainers@einsteintoolkit.org"
                                target="_blank" moz-do-not-send="true"
                                class="moz-txt-link-freetext">Maintainers@einsteintoolkit.org</a><br>
                              &gt; <a
                                href="http://lists.einsteintoolkit.org/mailman/listinfo/maintainers"
                                rel="noreferrer" target="_blank"
                                moz-do-not-send="true"
                                class="moz-txt-link-freetext">http://lists.einsteintoolkit.org/mailman/listinfo/maintainers</a><br>
                            </blockquote>
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