pr">#&gt;</span> g2   0   0   1   0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> g3   1   0   1   1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> g4   1   1   1   1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> g5   0   1   1   0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> g6   0   0   1   1</span>
<span class="r-in"><span><span class="va">sparse_comm</span> <span class="op">&lt;-</span> <span class="fu">dense2sparse</span><span class="op">(