 FALSE</code>.</p></dd>


<dt>time</dt>
<dd><p>Split analysis by time? If <code>NULL</code>, all data are assumed to stem from one time point. Using a character argument giving the name of a time column splits the analysis by unique values in that column and produces a faceted plot.</p></dd>


<dt>age.range</dt>
<dd><p>Defines the age range to be used for Z estimation. If <code>NULL</code>, all ages are used. If a numeric vector of length 2, the first number defines the minimum age to include and the last n