Sessionization
I will demonstrate the use of the complex or nested structures in the example of sessionization. In sessionization, we want to find the behavior of an entity, identified by some ID over a period of time. While the original records may come in any order, we want to summarize the behavior over time to derive trends.
We already analyzed web server logs in Chapter 1, Exploratory Data Analysis. We found out how often different web pages are accessed over a period of time. We could dice and slice this information, but without analyzing the sequence of pages visited, it would be hard to understand each individual user interaction with the website. In this chapter, I would like to give this analysis more individual flavor by tracking the ...
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