0.1 -75.3 19401 EMS: CARDIAC EMERGE… 2015-12-10 17:40:01 NORRISTOWN    
## 5  40.3 -75.6    NA EMS: DIZZINESS       2015-12-10 17:40:01 LOWER POTTSGR…
## 6  40.3 -75.3 19446 EMS: HEAD INJURY     2015-12-10 17:40:01 LANSDALE</code></pre>
<p>Say we are interested in the number of overdoses that occurred daily. However, we don’t want incidents during the same night to be split into two days, what would have happened when we use the default behavior. Rather, we reset the count at 8 am, grouping all nightl