s="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">model_sim</span> <span class="op">&lt;-</span> <span class="fu"><a href="reference/create_model.html">create_model</a></span><span class="op">(</span>name <span class="op">=</span> <span class="st">"SFC SIM"</span><span class="op">)</span></span></code></pre></div>
<p>Use the <code><a href="reference/add_variable.html">add_variable()</a></code> function to include variables in the model. This function creates a <code>$variables</cod