Book Image

RStudio for R Statistical Computing Cookbook

By : Andrea Cirillo
Book Image

RStudio for R Statistical Computing Cookbook

By: Andrea Cirillo

Overview of this book

The requirement of handling complex datasets, performing unprecedented statistical analysis, and providing real-time visualizations to businesses has concerned statisticians and analysts across the globe. RStudio is a useful and powerful tool for statistical analysis that harnesses the power of R for computational statistics, visualization, and data science, in an integrated development environment. This book is a collection of recipes that will help you learn and understand RStudio features so that you can effectively perform statistical analysis and reporting, code editing, and R development. The first few chapters will teach you how to set up your own data analysis project in RStudio, acquire data from different data sources, and manipulate and clean data for analysis and visualization purposes. You'll get hands-on with various data visualization methods using ggplot2, and you will create interactive and multidimensional visualizations with D3.js. Additional recipes will help you optimize your code; implement various statistical models to manage large datasets; perform text analysis and predictive analysis; and master time series analysis, machine learning, forecasting; and so on. In the final few chapters, you'll learn how to create reports from your analytical application with the full range of static and dynamic reporting tools that are available in RStudio so that you can effectively communicate results and even transform them into interactive web applications.
Table of Contents (15 chapters)
RStudio for R Statistical Computing Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Analyzing PDF reports in a folder with the tm package


Text analytics is basically a way to perform quantitative analysis on qualitative information stored in text. In this recipe, we will create a corpus of documents from PDF files and perform descriptive analytics on them, looking for the most frequent terms.

This is a particularly useful recipe for professionals who work with PDF reports.

In this recipe, we will explore the full text of the Italian medieval masterpiece Divine Comedy by Dante Alighieri. You can find out more on Wikipedia at https://en.wikipedia.org/wiki/Divine_Comedy:

Dante Alighieri is shown holding a copy of the Divine Comedy, next to the entrance to Hell, the seven terraces of Mount Purgatory and the city of Florence, with the spheres of Heaven above, in Michelino's fresco.

Getting ready

In this recipe, we will use the pdftotext utility in order to read text from the PDF format.

You can download pdftotext...