h2>
    <dl><dt>x</dt>
<dd><p>A NONMEM output object generated using <code><a href="read_nm.html">read_nm</a></code>.</p></dd>


<dt>output</dt>
<dd><p>A flag specifying the shrinkage estimates to be output. Valid flag
values are <code>eta</code> (the default), <code>epsilon</code>, or <code>all</code>.</p></dd>


<dt>type</dt>
<dd><p>Specifies the type of shrinkage to report. Valid values are <code>sd</code> 
(standard deviation, the default) or <code>vr</code> (variance, if present in the XML output).</p>