 = mtcars)</code></pre>
<pre><code>##  at(am)    cyl     wt     am
##       0 -1.181 -2.369 -1.566
##       1 -1.181 -6.566 -1.566</code></pre>
<p>Another plotting function - the <code>persp()</code> method for “lm” objects - gives even more functionality:</p>
<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCode r"><span class="kw">persp</span>(x, <span class="st">"cyl"</span>, <span class="st">"wt"</span>)</code></pre></div>
<p><img src="Introduction_files/figure-html/unnamed-chunk