r   120</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># return a matrix (only possible when input is a matrix and</span></span></span>
<span class="r-in"><span><span class="co"># complete = TRUE) with small values replaced by zeros</span></span></span>
<span class="r-in"><span><span class="fu">sum_lump</span><span class="op">(</span><span class="va">m</span>, threshold <span class="op">=</span> <span class="fl">50</span>, complete <span class="op">=</span> <span cl