lters, pass NULL here and filter out invalid
alters afterwards.</p></dd>


<dt>ID.vars</dt>
<dd><p>Character. For onefile_to_egor only the name of the ego ID needs
to be provided.</p></dd>


<dt>attr.start.col</dt>
<dd><p>Index or name of the first column containing alter attributes.</p></dd>


<dt>attr.end.col</dt>
<dd><p>Index or name of the last column containing alter attributes.</p></dd>


<dt>max.alters</dt>
<dd><p>Maximum number of alters.</p></dd>


<dt>aa.first.var</dt>
<dd><p>First column containi