t;%</span><span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/utils/topics/head">head</a></span>()</a></code></pre></div>
<pre><code>##                   day balance
## 1 2016-10-20 22:00:00      NA
## 2 2016-10-20 23:00:00      NA
## 3 2016-10-21 00:00:00  304.46
## 4 2016-10-21 01:00:00      NA
## 5 2016-10-21 02:00:00      NA
## 6 2016-10-21 03:00:00      NA</code></pre>
</div>
<div id="grouping" class="section level3">
<h3 class="hasAnchor">
<a href="#grouping" cla