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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

Why do we want to classify a signal?

First things first, we’d like to introduce the use case and the data we’ll work with in this chapter. Using a microphone, we recorded audio data from four different audio sources. We’ll build a model to analyze short examples of these sounds and identify them automatically.

Our use case is focused on audio data, but the pipeline we will create works equally well with many other recordings from IoT devices. In a manufacturing setting, for example, you may use this approach to attach vibration sensors to a machine and classify the activity, or even predict anomalies for predictive maintenance tasks. The Fourier transform really can be used in any place where data has temporal, or even spatial, relations.

Let’s look at what the raw audio signal from source one looks like in the following plot.

Figure 8.1 – Plot of raw audio data from source one

Figure 8.1 – Plot of raw audio data from source one

The preceding plot shows a short...

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