R Web Scraping Quick Start Guide

Techniques and Tools to Crawl and Scrape Data from Websites



Bookstore > Books > R Web Scraping Quick Start Guide

Price$29.99
Rating
AuthorOlgun Aydin
PublisherPackt Publishing
Published2018
Pages114
LanguageEnglish
FormatPaper book / ebook (PDF)
ISBN-101789138736
ISBN-139781789138733
EBook Hardcover Paperback

Web scraping is a technique to extract data from websites. It simulates the behavior of a website user to turn the website itself into a web service to retrieve or introduce new data. This book gives you all you need to get started with scraping web pages using R programming.

You will learn about the rules of RegEx and Xpath, key components for scraping website data. We will show you web scraping techniques, methodologies, and frameworks. With this book's guidance, you will become comfortable with the tools to write and test RegEx and XPath rules.

We will focus on examples of dynamic websites for scraping data and how to implement the techniques learned. You will learn how to collect URLs and then create XPath rules for your first web scraping script using rvest library. From the data you collect, you will be able to calculate the statistics and create R plots to visualize them.

Finally, you will discover how to use Selenium drivers with R for more sophisticated scraping. You will create AWS instances and use R to connect a PostgreSQL database hosted on AWS. By the end of the book, you will be sufficiently confident to create end-to-end web scraping systems using R.





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