>
<span>  ode.solver <span class="op">=</span> <span class="st">"euler"</span>,</span>
<span>  ode.timestep <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/diff.html" class="external-link">diff</a></span><span class="op">(</span><span class="va">data</span><span class="op">$</span><span class="va">t</span><span class="op">)</span>,</span>
<span>  loss <span class="op">=</span> <span class="st">"quadratic"</span>,</span>
<span>  loss_c <span class="op">=</span> <span class="cn">NUL