ass="va">coord</span><span class="op">)</span><span class="op">)</span>, <span class="va">coord</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">semivario</span> <span class="op">&lt;-</span> <span class="kw">function</span><span class="op">(</span><span class="va">d</span>, <span class="va">alpha</span> <span class="op">=</span> <span class="fl">1.5</span>, <span class="va">lambda</span> <span class="op">=</span> <span