Book Image

R Data Analysis Projects

Book Image

R Data Analysis Projects

Overview of this book

R offers a large variety of packages and libraries for fast and accurate data analysis and visualization. As a result, it’s one of the most popularly used languages by data scientists and analysts, or anyone who wants to perform data analysis. This book will demonstrate how you can put to use your existing knowledge of data analysis in R to build highly efficient, end-to-end data analysis pipelines without any hassle. You’ll start by building a content-based recommendation system, followed by building a project on sentiment analysis with tweets. You’ll implement time-series modeling for anomaly detection, and understand cluster analysis of streaming data. You’ll work through projects on performing efficient market data research, building recommendation systems, and analyzing networks accurately, all provided with easy to follow codes. With the help of these real-world projects, you’ll get a better understanding of the challenges faced when building data analysis pipelines, and see how you can overcome them without compromising on the efficiency or accuracy of your systems. The book covers some popularly used R packages such as dplyr, ggplot2, RShiny, and others, and includes tips on using them effectively. By the end of this book, you’ll have a better understanding of data analysis with R, and be able to put your knowledge to practical use without any hassle.
Table of Contents (15 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Chapter 8. Analyze and Understand Networks Using R

Network analysis is the study of graphs. Graphs are defined by a set of nodes or vertices connected by edges. Both the nodes and vertices can have attributes describing them. Most importantly, the edges can carry weight, indicating the importance of the connection. When the directions of the edges are preserved, the graph is called a directed graph; when not preserved, it's called an undirected graph. Network analysis, or network theory, or graph theory provides a rich set of algorithms to analyze and understand graphs. The famous Koenigsberg problem (http://mathworld.wolfram.com/KoenigsbergBridgeProblem.html) introduced by Euler is one of the first graph theory problems to be studied. Koenigsberg is an old city in Prussia (modern day Russia). The river Pregal separates the city. There are two other islands. There are seven bridges connecting the islands and the cities. The Koenigsberg problem was to devise a walk through the city that would...