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

Summary


We started the chapter by introducing content-based filtering. We discussed how content based filtering methods can help with cold-start problems in recommendation systems. We then explained the new aggregator use case. We explored the data provided by the customer--various news articles from different publishers belonging to different categories. Based on the data, we came up with a design for our content-based recommendation system.

We implemented a similarity dictionary; given a news article, this dictionary would be able to provide the top N matching articles. The similarity was calculated based on the words present in the article. We leveraged the vector space model for text and ultimately used the cosine distance to find the similarities between articles.

We implemented a simple search based on the similarity dictionary to get a list of matching news articles. We introduced additional features for the matching document, sentiment, and polarity score.

Finally, we implemented fuzzy...