>drat <span class="op">*</span><span class="st"> </span>wt <span class="op">*</span><span class="st"> </span>am, <span class="dt">data =</span> mtcars)
cdat &lt;-<span class="st"> </span><span class="kw"><a href="../reference/cplot.html">cplot</a></span>(x1, <span class="st">"wt"</span>, <span class="dt">draw =</span> <span class="ot">FALSE</span>)
<span class="kw">head</span>(cdat)</code></pre></div>
<pre><code>##      xvals    yvals    upper    lower
## 1 1.513000 28.66765 33.04903 24.28627
## 2 1.675958 