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Table Of Contents
Machine Learning for Time Series with Python - Second Edition
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A simple line plot is the first step in analyzing a time series, but it is rarely the last. To truly understand the patterns that drive a series, we need more specialized tools. This section teaches you how to use visualization not for aesthetics, but as a diagnostic instrument. We will create plots specifically designed to answer questions about seasonality, cycles, and autocorrelation. These visual diagnostics are often the fastest way to gain intuition about your data and formulate a hypothesis for your modeling approach.
How does demand on a Monday differ from a Saturday? How does the pattern in January compare to July? These are questions about grouped or nested seasonality. A standard line plot makes these comparisons difficult. We need to slice and rearrange the data visually to make these patterns pop out. We will focus on three plots: the seasonal plot, the daily profile plot, and the lag plot...