Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "You can also export the analysis.R script as a report in the HTML, PDF, or MS Word format, and you will then find the report in your code folder."

A block of code is set as follows:

gaToken <- GoogleApiCreds(
                userName = "your@email.com",
                list(
                  client_id = "your client ID",
                  client_secret = "your client secret") 
                )

save(gaToken, file = "auth/gaToken")

Any command-line input or output is written as follows:

$ sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys E084DAB9

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Therefore, just click on the Publish button and RStudio will guide you through the process."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.