ng-single-element-of-a-vector"><i class="fa fa-check"></i><b>24.2.2</b> Evaluating single element of a vector</a></li>
</ul></li>
<li class="chapter" data-level="24.3" data-path="240_na_nan_inf.html"><a href="240_na_nan_inf.html#null"><i class="fa fa-check"></i><b>24.3</b> NULL</a></li>
<li class="chapter" data-level="24.4" data-path="240_na_nan_inf.html"><a href="240_na_nan_inf.html#points-to-note-when-handling-na-with-rcpp"><i class="fa fa-check"></i><b>24.4</b> Points to note when handling NA with Rcpp</