ass="extype" href="../Vec.html">Vec</a>[T]) ⇒ <a name="org.saddle.stats.VecRollingStats" class="extype" href="VecRollingStats.html">VecRollingStats</a>[T]</span>)</span><span class="result">: <a name="org.saddle.Frame" class="extype" href="../Frame.html">Frame</a>[RX, CX, <span name="scala.Int" class="extype">Int</span>]</span>
      </span>
      </h4>
      <p class="shortcomment cmt">Rolling count; compute count of number of elements in columns of Frame over a sliding window, ignoring
any NA values.</p