Conventions

In this book, you will find a number of styles of text 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: "We also set the plot title using the main argument."

A block of code is set as follows:

install.packages("openair")
library(openair)

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "By default, the data is in ascending order of total points scored by each player (as can be seen from the light to dark blue progression in the Total Points column)."