of these many
times!</p>
<table class="table">
<thead><tr class="header">
<th>Function</th>
<th>Short For</th>
</tr></thead>
<tbody>
<tr class="odd">
<td><code><a href="../reference/countNA.html">countNA()</a></code></td>
<td><code>sum(is.na())</code></td>
</tr>
<tr class="even">
<td><code><a href="../reference/propNA.html">propNA()</a></code></td>
<td><code>mean(is.na())</code></td>
</tr>
<tr class="odd">
<td><code><a href="../reference/notNA.html">notNA()</a></code></td>
<td><code>sum(!is.na())</code></td