Book Image

Codeless Time Series Analysis with KNIME

By : KNIME AG, Corey Weisinger, Maarit Widmann, Daniele Tonini
Book Image

Codeless Time Series Analysis with KNIME

By: KNIME AG, Corey Weisinger, Maarit Widmann, Daniele Tonini

Overview of this book

This book will take you on a practical journey, teaching you how to implement solutions for many use cases involving time series analysis techniques. This learning journey is organized in a crescendo of difficulty, starting from the easiest yet effective techniques applied to weather forecasting, then introducing ARIMA and its variations, moving on to machine learning for audio signal classification, training deep learning architectures to predict glucose levels and electrical energy demand, and ending with an approach to anomaly detection in IoT. There’s no time series analysis book without a solution for stock price predictions and you’ll find this use case at the end of the book, together with a few more demand prediction use cases that rely on the integration of KNIME Analytics Platform and other external tools. By the end of this time series book, you’ll have learned about popular time series analysis techniques and algorithms, KNIME Analytics Platform, its time series extension, and how to apply both to common use cases.
Table of Contents (20 chapters)
1
Part 1: Time Series Basics and KNIME Analytics Platform
7
Part 2: Building and Deploying a Forecasting Model
14
Part 3: Forecasting on Mixed Platforms

Detecting anomalies with a control chart

A control chart defines boundaries for a normal signal based on the statistics of the training set, which, in this case, refers to values from a correctly working system. During deployment, an alarm system is built to warn when the signal is exceeding the boundaries.

We will introduce and build a control chart based on the IoT data using the following steps:

  1. Introducing a control chart
  2. Implementing a control chart
  3. Deploying a control chart

In the first subsection, we will show you how to define and visualize a control chart.

Introducing a control chart

A control chart defines the normal functioning of a process by a statistical range. We define this range by calculating the following statistics over the training window:

  • Upper limit: Mean+12*Standard Deviation
  • Lower limit: Mean-12*Standard Deviation

Once these boundaries have been set, we can visualize the control chart in a line plot. As an...