Book Image

Machine Learning with the Elastic Stack - Second Edition

By : Rich Collier, Camilla Montonen, Bahaaldine Azarmi
5 (1)
Book Image

Machine Learning with the Elastic Stack - Second Edition

5 (1)
By: Rich Collier, Camilla Montonen, Bahaaldine Azarmi

Overview of this book

Elastic Stack, previously known as the ELK stack, is a log analysis solution that helps users ingest, process, and analyze search data effectively. With the addition of machine learning, a key commercial feature, the Elastic Stack makes this process even more efficient. This updated second edition of Machine Learning with the Elastic Stack provides a comprehensive overview of Elastic Stack's machine learning features for both time series data analysis as well as for classification, regression, and outlier detection. The book starts by explaining machine learning concepts in an intuitive way. You'll then perform time series analysis on different types of data, such as log files, network flows, application metrics, and financial data. As you progress through the chapters, you'll deploy machine learning within Elastic Stack for logging, security, and metrics. Finally, you'll discover how data frame analysis opens up a whole new set of use cases that machine learning can help you with. By the end of this Elastic Stack book, you'll have hands-on machine learning and Elastic Stack experience, along with the knowledge you need to incorporate machine learning in your distributed search and data analysis platform.
Table of Contents (19 chapters)
1
Section 1 – Getting Started with Machine Learning with Elastic Stack
4
Section 2 – Time Series Analysis – Anomaly Detection and Forecasting
11
Section 3 – Data Frame Analysis

Interpreting results

In the last section, we took a look at the theoretical underpinnings of decision trees and took a conceptual tour of how they are constructed. In this section, we will return to the classification example we examined earlier in the chapter and take a closer look at the format of the results as well as how to interpret them.

Earlier in the chapter, we created a trained model to predict whether a given breast tissue sample was malicious or benign (as a reminder, in this dataset malignant is denoted by class 2 and benign by class 4). A snippet of the classification results for this model is shown in Figure 11.18.

Figure 11.17 – Classification results for a sample data point in the Wisconsin breast cancer dataset

With this trained model, we can take previously unseen data points and make predictions. What form do these predictions take? In the simplest form, a data point is assigned a class label (the field ml.Class_prediction in...