eturns</span>,
          event_start <span class='op'>=</span>  <span class='fu'><a href='https://rdrr.io/pkg/zoo/man/yearmon.html'>as.Date</a></span><span class='op'>(</span><span class='st'>"2020-03-16"</span><span class='op'>)</span>,
          event_end <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/pkg/zoo/man/yearmon.html'>as.Date</a></span><span class='op'>(</span><span class='st'>"2020-03-20"</span><span class='op'>)</span><span class='op'>)</span>
</div><div class='output co'>#