/code> variable is continuous, taking values from 2.76 to 4.93:</p>
<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw"><a href="../reference/margins.html">margins</a></span>(x1, <span class="dt">at =</span> <span class="kw">list</span>(<span class="dt">drat =</span> <span class="kw">range</span>(mtcars<span class="op">$</span>drat)))</code></pre></div>
<pre><code>## Average marginal effects at specified values</code></pre>
<pre><code>## lm(formula = mpg ~ drat * wt