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Codeless Time Series Analysis with KNIME

Codeless Time Series Analysis with KNIME

By : KNIME AG , Corey Weisinger, Maarit Widmann, Daniele Tonini
4.8 (10)
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Codeless Time Series Analysis with KNIME

Codeless Time Series Analysis with KNIME

4.8 (10)
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)
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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

Stationarity

Stationarity is a mathematical concept connected to stochastic processes, and so it’s a broader concept as it’s not only related to Time Series Analysis. Here, we don’t focus on the mathematical definition (also because we have different types of stationarities in mathematics and so many definitions), but we explain what a stationary time series is.

The most simple definition of stationarity is the following: stationarity indicates that fundamental statistical properties of the Time Series, such as its mean and its variance, do not change over time. However, this does not imply that the Time Series does not change at all over time. We can still observe time-dependent dynamics and autocorrelation in a stationary time series, but the mean, the variance, and the autocorrelation structure of a stationary time series will be roughly constant over time.

So, the main characteristics of a stationary time series are the following:

  • The values oscillate...
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