Book Image

R Web Scraping Quick Start Guide

By : Olgun Aydin
Book Image

R Web Scraping Quick Start Guide

By: Olgun Aydin

Overview of this book

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.
Table of Contents (7 chapters)

Some of the cloud services

In this part, we are going to talk about two well-known and mostly preferred cloud services that are Google Cloud Compute Engine and Amazon Web Services.

Amazon Web Services (AWS)

The AWS platform emerged in July, 2002, initially consisting of only a few different vehicles and services. Later in late 2003, Chris Pinkham and Benjamin Black announced that the AWS concept would be reformatted when they offered an Amazon article explaining a vision for a fully standardized, fully automated retail storage infrastructure and applying it intensively to web services such as storage and retrieval.

By offering access to virtual servers as a service, they are encouraging the company to generate revenue from...