Book Image

R for Data Science Cookbook (n)

By : Yu-Wei, Chiu (David Chiu)
Book Image

R for Data Science Cookbook (n)

By: Yu-Wei, Chiu (David Chiu)

Overview of this book

This cookbook offers a range of data analysis samples in simple and straightforward R code, providing step-by-step resources and time-saving methods to help you solve data problems efficiently. The first section deals with how to create R functions to avoid the unnecessary duplication of code. You will learn how to prepare, process, and perform sophisticated ETL for heterogeneous data sources with R packages. An example of data manipulation is provided, illustrating how to use the “dplyr” and “data.table” packages to efficiently process larger data structures. We also focus on “ggplot2” and show you how to create advanced figures for data exploration. In addition, you will learn how to build an interactive report using the “ggvis” package. Later chapters offer insight into time series analysis on financial data, while there is detailed information on the hot topic of machine learning, including data classification, regression, clustering, association rule mining, and dimension reduction. By the end of this book, you will understand how to resolve issues and will be able to comfortably offer solutions to problems encountered while performing data analysis.
Table of Contents (19 chapters)
R for Data Science Cookbook
About the Author
About the Reviewer

Accessing Facebook data

Social network data is another great source for the user who is interested in exploring and analyzing social interactions. The main difference between social network data and web data is that social network platforms often provide a semi-structured data format (mostly JSON). Thus, one can easily access the data without the need to inspect how the data is structured. In this recipe, we will illustrate how to use rvest and rson to read and parse data from Facebook.

Getting ready

In this recipe, you need to prepare your environment with R installed and a computer that can access the Internet.

How to do it…

Perform the following steps to access data from Facebook:

  1. First, we need to log in to Facebook and access the developer page (

    Figure 18: Accessing the Facebook developer page

  2. Click on Tools & Support, and select Graph API Explorer:

    Figure 19: Selecting the Graph API Explorer

  3. Next, click on Get Token, and choose Get Access Token: