="arg-na-action">na.action<a class="anchor" aria-label="anchor" href="#arg-na-action"></a></dt>
<dd><p>Integer indicating how NAs are managed. The default is 1
for 'na.omit'. The alternative is 2 for 'na.fail'. Other options such as
'na.pass' or 'na.exclude' are not implemented in the current version.</p></dd>


<dt id="arg-posfix">posfix<a class="anchor" aria-label="anchor" href="#arg-posfix"></a></dt>
<dd><p>Optional vector specifying the indices in vector B of the
parameters that should not be estimated.