Summary

This chapter included the theory behind and practical implementation of SAX and an understanding of a time series from a statistical viewpoint. As the iSAX index construction is based on the SAX representation, we cannot construct an iSAX index without computing SAX representations.

Before you begin reading Chapter 3, please make sure that you know how to calculate the SAX representation of a time series or a subsequence, given the sliding window size, the number of segments, and the cardinality.

The next chapter contains the theory related to the iSAX index, shows you how to manually construct an iSAX index (which you will find very entertaining), and includes the development of some handy utilities.