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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

Missing value imputation

In this section, we will show you how to impute the missing values in the numeric column. Missing values might exist in the raw data, or they can be introduced in the data during the time alignment. We will introduce the missing value imputation in the following subsections:

  • Defining different types of missing values
  • Introducing missing value imputation techniques

First, we will investigate the different types of missing values.

Defining the different types of missing values

In KNIME, you can recognize a missing value from a red question mark in the data. Furthermore, many nodes, such as the line plot for visualizing time series, provide the option to either remove the missing values or leave them in before performing their tasks. Also, you can inspect the number of missing values in the data in the No. Missing column in the output view of the Statistics node:

Figure 3.7 – Displaying the number of missing...

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