R Web Scraping Quick Start Guide
Web Scraping techniques are getting more popular, since data is as valuable as oil in 21st century. Through this book get some key knowledge about using XPath, regEX; web scraping libraries for R like rvest and RSelenium technologies. Key Features Techniques, tools and frameworks for web scraping wi...
| Otros Autores: | |
|---|---|
| Formato: | Libro electrónico |
| Idioma: | Inglés |
| Publicado: |
Packt Publishing
2018.
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| Edición: | 1st edition |
| Materias: | |
| Ver en Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009631854006719 |
Tabla de Contenidos:
- Cover
- Title Page
- Copyright and Credits
- Dedication
- Packt Upsell
- Contributors
- Table of Contents
- Preface
- Chapter 1: Introduction to Web Scraping
- Learning about data on the internet
- Introduction to XPath (XML Path)
- Data extraction systems
- Web scraping techniques
- Traditional copy and paste
- Text grabbing and regular expression
- Document Object Model (DOM)
- Semantic annotation recognition
- Web scraping tools
- JavaScript tools
- Web crawling frameworks
- Web crawling environment in R
- Summary
- Chapter 2: XML Path Language and Regular Expression Language
- XML Path (XPath)
- Nodes
- Relationships between nodes
- Parent
- Child
- Sibling
- Ancestor
- Descendant
- Predicates
- Selecting unknown nodes
- Selecting several paths
- Regular expression language (Regex)
- How to match a single character
- How to match the characters of a set
- How to match words
- Exercises on RegEx and XPath
- RegEx exercises
- XPath exercises
- Summary
- Chapter 3: Web Scraping with rvest
- Introducing rvest
- Step-by-step web scraping with rvest
- Writing XPath rules
- Writing your first scraping script
- Playing with data
- Summary
- Chapter 4: Web Scraping with Rselenium
- Advantages and disadvantages of using Selenium for web scraping
- RSelenium
- Step-by-step web scraping with RSelenium
- Collecting data with RSelenium
- Summary
- Chapter 5: Storing Data and Creating Cronjob
- Cloud engine models
- Infrastructure as a service (IaaS)
- Platform as a service (PaaS)
- Software as a service (SaaS)
- Mobile backend as a service (MBaaS)
- Function as a service (FaaS)
- Some of the cloud services
- Amazon Web Services (AWS)
- Google Cloud
- Cronjob
- Storing data and creating schedule jobs for web scraping
- Creating an AWS RDS Instance.
- Connecting to the PostgreSQL database on AWS
- Creating cronjob
- Summary
- Other Books You May Enjoy
- Index.
