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Data Wrangling with R

You're reading from   Data Wrangling with R Load, explore, transform and visualize data for modeling with tidyverse libraries

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Product type Paperback
Published in Feb 2023
Publisher Packt
ISBN-13 9781803235400
Length 384 pages
Edition 1st Edition
Languages
Concepts
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Author (1):
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Gustavo Santos Gustavo Santos
Author Profile Icon Gustavo Santos
Gustavo Santos
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Table of Contents (21) Chapters Close

Preface 1. Part 1: Load and Explore Data
2. Chapter 1: Fundamentals of Data Wrangling FREE CHAPTER 3. Chapter 2: Loading and Exploring Datasets 4. Chapter 3: Basic Data Visualization 5. Part 2: Data Wrangling
6. Chapter 4: Working with Strings 7. Chapter 5: Working with Numbers 8. Chapter 6: Working with Date and Time Objects 9. Chapter 7: Transformations with Base R 10. Chapter 8: Transformations with Tidyverse Libraries 11. Chapter 9: Exploratory Data Analysis 12. Part 3: Data Visualization
13. Chapter 10: Introduction to ggplot2 14. Chapter 11: Enhanced Visualizations with ggplot2 15. Chapter 12: Other Data Visualization Options 16. Part 4: Modeling
17. Chapter 13: Building a Model with R 18. Chapter 14: Build an Application with Shiny in R 19. Conclusion 20. Other Books You May Enjoy

Machine learning concepts

Before we move on to the project itself, let’s just build a background about machine learning concepts. This content is not the main scope of this book; therefore, we will quickly go over a couple of definitions to put us on the same page for the remainder of this book.

A model is a representation of a theory (HAIR Jr. et al, 2019) but is also defined as a simplification or approximation of reality (Burnham & Anderson, 2002). In other words, modeling data involves finding patterns that can help us explain a response, which is the most probable outcome from that observation.

With that said, the model will just reflect the data that it received. For that reason, it is crucial that the input data is clean and representative of the reality we are trying to model. To exemplify this, think about when we see a dataset with too many missing values that are going to be either removed or inputted. Both approaches will certainly have an impact on the...

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