if</span> (<span class="sc">!</span><span class="fu">require</span>(remotes)) <span class="fu">install.packages</span>(<span class="st">"remotes"</span>)</span>
<span id="cb3-2"><a href="#cb3-2" tabindex="-1"></a> remotes<span class="sc">::</span><span class="fu">install_github</span>(<span class="st">"friendly/matlib"</span>, <span class="at">build_vignettes =</span> <span class="cn">TRUE</span>)</span></code></pre></div>
<p>The functions that draw 3D graphs use the <strong>rgl</strong> package. On macOS, 