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

Visualization offers a great way to understand your data. Similarly, visualization is a great way to understand the structure of an iSAX index, especially a big one. In this chapter, we saw various ways to visualize an iSAX index with the help of the D3.js JavaScript library and got a better look at the distribution of the subsequences and the height of iSAX indexes.

However, it would be great to try your own visualizations using the D3.js JavaScript library, R, or other appropriate Python packages, which can also create impressive visualizations.

Lastly, do not underestimate the power of a good visualization as it can reveal lots of information in an easy-to-discover way. Just keep in mind that visualization is an art that is hard to master.

The next chapter is about using iSAX indexes for the approximate calculation of the Matrix Profile and the MPdist distance.