ass="r-pr">#&gt;</span> $title.ref</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $title.rowvar</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NULL</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $title.colvar</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> NUL