-17-1.png" width="700"></p>
<p>This three-dimensional representation can be easily rotated using the <code>theta</code> and <code>phi</code> arguments. If multiple values are specified for each, facetting is automatically provided:</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>, <span class="dt">theta =</span> <span class="kw">c</span>(<span class="dv">0</span>, <span class="dv">90<