This article is loosely based on a time series challenge from customer data. I have fabricated 3 data files such that they represent the same challenge and we will go through the process of discovering that data. The primary challenge in this data set is that it is from a sleep study and the researchers left the date portion of the time stamp off. What this means is that at midnight, the data plots at the beginning of the x-axis. The second challenge is lining up data to see if there is anything interesting with the time. So yes, you can simply plot using the index that python generates, however I’m also interested in the actual time itself as this is a study involving humans.