ass='output co'>#&gt;  [1] "2008-01-27" "2005-07-08" "2003-01-22" "2009-04-19" "2008-08-19"
#&gt;  [6] "2013-08-17" "2003-07-28" "2012-06-21" "2001-02-21" "2006-03-11"</div><div class='input'><span class='fu'>r_date_of_births</span>(<span class='fl'>10</span>,
                 <span class='kw'>start</span> <span class='kw'>=</span> <span class='fu'>as.Date</span>(<span class='st'>"2000-01-01"</span>),
                 <span class='kw'>end</span> <span class='kw'>=</span> <span class='fu'>as.Date</span>(<spa