00</span>, <span class='fl'>3000</span><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'>100</span>, <span class='fl'>200</span>, <span class='fl'>150</span>, <span class='cn'>NA</span><span class='op'>)</span><span class='op'>)</span></span>
<span class='r-wrn co'><span class='r-pr'>#&gt;</span> <span class='warning'>Warning: </span>At least one of your standard errors is 0 or NA. Any observation with</span>
<span class