I have a CSV file that gives data on car crashes in a particular State. One of the columns gives the specific time these crashes occurred. There are over 18,000 entries.
What I want to do is to group these timestamps as such: 00:00-03:00, 03:00-06:00, 06:00-09:00, etc. But I'm unsure of how I can first organize my column data so it groups my time stamps in such a way. Any advice?