October 2026
Intermediate to advanced
486 pages
12h 21m
English
Before building a reliable forecast, you must first learn to diagnose your data. The defining characteristic of a time series is temporal dependence: the value of an observation today is often a function of its value yesterday. We’ve discussed in Chapter 1 that many standard machine learning models are built on the assumption that data points are independent. Applying them to time series often leads to failure because this core assumption is fundamentally broken; shuffling the rows of a time series destroys the very patterns that make forecasting possible.
The chapter begins by exploring the mathematical foundations of time series, teaching you to probe your data for core properties like autocorrelation ...
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