an class="r-in"><span><span class="va">u</span> <span class="op">&lt;-</span> <span class="fu">interpBarnes</span><span class="op">(</span><span class="va">wind</span><span class="op">$</span><span class="va">x</span>, <span class="va">wind</span><span class="op">$</span><span class="va">y</span>, <span class="va">wind</span><span class="op">$</span><span class="va">z</span>, trim <span class="op">=</span> <span class="fl">0.1</span><span class="op">)</span></span></span>
<span class="r-in"><span><span clas