e">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">zoom_mat</span><span class="op">(</span></span>
<span>  <span class="va">x</span>,</span>
<span>  min_zoom <span class="op">=</span> <span class="fl">1</span>,</span>
<span>  max_zoom <span class="op">=</span> <span class="fl">1.1</span>,</span>
<span>  p <span class="op">=</span> <span class="fl">0.5</span>,</span>
<span>  draw <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  draw_x <span class="op"