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

Trend and seasonality components

If we consider the graphical analysis presented in the previous chapter to describe a Time Series, it is evident that there are different patterns that characterize the temporal dynamics of the data. We have already spoken, several times, in the book about trend or seasonality; however, it is necessary to go into more detail about these components in order to subsequently understand how to treat them within a forecasting model. Let’s start with trends.

Trend

Trend can be described as the direction in which the Time Series is running during a long period. So, in general, a trend exists when there is a long-term increase (that is, the upward trend) or decrease (that is, the downward trend) in some Time Series data. Typically, it’s difficult to formally define “trend” because its characteristics depend on the framework where the trend is analyzed. For instance, the formal definition of trend could be different depending...