There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Import the ggplot2 and reshape libraries."

A block of code is set as follows:

library(bbmle)
N <- 1000
xx <- rgamma(N, shape=20,rate=2)

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

> install.packages("tscount")

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "The cumulative density function (CDF) returns the cumulative probability mass for each value of X."