 class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/lengths.html'>lengths</a></span><span class='op'>(</span><span class='va'>CM</span><span class='op'>)</span> <span class='co'>## Which cells are empty</span>
<span class='co'>## library(vegan)</span>
<span class='co'>## R &lt;- lapply(CM[which(lCM&gt;0)], specaccum)</span>
<span class='co'># }</span>
</div></pre>
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