John Verzani 
Getting Started with RStudio [PDF ebook] 
An Integrated Development Environment for R

Dive into the RStudio Integrated Development Environment (IDE) for using and programming R, the popular open source software for statistical computing and graphics. This concise book provides new and experienced users with an overview of RStudio, as well as hands-on instructions for analyzing data, generating reports, and developing R software packages.The open source RStudio IDE brings many powerful coding tools together into an intuitive, easy-to-learn interface. With this guide, youll learn how to use its main componentsincluding the console, source code editor, and data viewerthrough descriptions and case studies. Getting Started with RStudio serves as both a reference and introduction to this unique IDE.Use RStudio to provide enhanced support for interactive R sessions Clean and format raw data quickly with several RStudio components Edit R commands with RStudios code editor, and combine them into functions Easily locate and use more than 3, 000 add-on packages in Rs CRAN service Develop and document your own R packages with the code editor and related components Create one-click PDF reports in RStudio with a mix of text and R output