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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

Chapter 8: Audio Signal Classification with an FFT and a Gradient-Boosted Forest

In this chapter, we will break from forecasting to perform a different type of machine learning on time series data: classification. Using the Fourier transform, we will transform our data and perform dimensionality reduction, then train a familiar classification model with input and target columns to classify an audio source.

The Fourier transform, however, has a myriad of applications in time series analysis beyond classification. It is used to better explore time series data in search of patterns by shifting to the frequency domain where we can view component seasonal patterns. Furthermore, it is used to construct complex state space models capable of incorporating more seasonalities than the SARIMA.

Before we can reach that conclusion though, we will discuss why working with high-frequency time series data can be tricky, introduce the theory behind the Fourier transform, and discuss how window...

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