'>sc</span>, EC<span class='op'>=</span><span class='va'>ec</span><span class='op'>)</span>
</div><div class='output co'>#&gt; [1] TRUE</div><div class='input'>
<span class='va'>sc</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span>USUBJID  <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>1</span>,<span class='fl'>1</span>,<