Book Image

Time Series Indexing

By : Mihalis Tsoukalos
Book Image

Time Series Indexing

By: Mihalis Tsoukalos

Overview of this book

Time series are everywhere, ranging from financial data and system metrics to weather stations and medical records. Being able to access, search, and compare time series data quickly is essential, and this comprehensive guide enables you to do just that by helping you explore SAX representation and the most effective time series index, iSAX. The book begins by teaching you about the implementation of SAX representation in Python as well as the iSAX index, along with the required theory sourced from academic research papers. The chapters are filled with figures and plots to help you follow the presented topics and understand key concepts easily. But what makes this book really great is that it contains the right amount of knowledge about time series indexing using the right amount of theory and practice so that you can work with time series and develop time series indexes successfully. Additionally, the presented code can be easily ported to any other modern programming language, such as Swift, Java, C, C++, Ruby, Kotlin, Go, Rust, and JavaScript. By the end of this book, you'll have learned how to harness the power of iSAX and SAX representation to efficiently index and analyze time series data and will be equipped to develop your own time series indexes and effectively work with time series data.
Table of Contents (11 chapters)

Summary

In this chapter, we have seen code for testing the speed of an iSAX index and joining two iSAX indexes based on the SAX representations of their nodes. Then, we briefly discussed the subject of testing Python code and implemented three tests for the isax package.

We also discussed the joining of iSAX indexes, which is based on the node types. Additionally, the tests we carried out made sure that the core logic of our code is correct.

In the next chapter, we are going to learn how to visualize iSAX indexes to better understand their structure and performance.

Before you start reading and working through Chapter 6, experiment with the command-line utilities that we have developed in this chapter and try to create your own.