an><span class="va">pred10step</span><span class="op">$</span><span class="va">var.x</span><span class="op">)</span>,</span>
<span>                  ymax<span class="op">=</span><span class="va">pred10step</span><span class="op">$</span><span class="va">x</span><span class="op">+</span><span class="fl">2</span><span class="op">*</span><span class="fu"><a href="https://rdrr.io/r/base/MathFun.html" class="external-link">sqrt</a></span><span class="op">(</span><span class="va">pred10step</span><span class="op"