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: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."
A block of code is set as follows:
# R version and contributors
R.version.string
contributors()
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
1 + 2
2 + 5 * 4
3 ^ 4
sqrt(81)
pi
Any command-line input or output is written as follows:
install.packages("RODBC")
library(RODBC)
Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."
Warnings or important notes appear like this.
Tips and tricks appear like this.