n><span class="fu">check</span><span class="op">(</span><span class="va">a</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S4 method for class 'SpatRaster,missing'</span></span>
<span><span class="fu">check</span><span class="op">(</span><span class="va">a</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S4 method for class 'matrix,missing'</span></span>
<span><span class="fu">check</span><span class="op">(</span><span class="va">a</span><span class